Ukraine's President Volodymr Zelensky has accused Russia of "doing everything it can" to prevent a meeting with Vladimir Putin to try to end the war.

US President Donald Trump has sought to bring the two leaders together, but he said on Friday "that's like oil and vinegar... they don't get along too well".

Russian Foreign Minister Sergei Lavrov said Putin was ready to meet Ukraine's leader "when the agenda is ready for a summit, and this agenda is not ready at all", accusing Zelensky of saying "no to everything".

After an intensive week of diplomacy, in which Trump first met Putin in Alaska and then Zelensky with European leaders in Washington, the US president said the war was turning out to be the most difficult he had tried to stop.

Trump said after a call with the Russian leader on Monday that he had begun arrangements for a Putin-Zelensky summit that he would join afterwards.

Ukraine's president has backed the move, but he has sought security guarantees from Western allies to prevent any future Russian attack in the event of a peace deal: "Ukraine, unlike Russia, is not afraid of any meetings between leaders."

On a visit to Kyiv, Nato Secretary General Mark Rutte said Trump was aiming to "break the deadlock" and the alliance was working on robust security guarantees with the US and Europe to ensure Putin "will never ever try to attack Ukraine again".

• Proposed Ukraine land concessions are Putin trap, warns EU top diplomat
• If a Putin-Zelensky summit takes place, where could it be?

Speaking alongside Rutte, Zelensky said he wanted Ukraine's security guarantees to reflect Nato's Article 5, which considers an attack on one member of the alliance an attack against all Nato members.

"This is the beginning of a big undertaking, and it is not easy, because guarantees consist of what our partners can give Ukraine, as well as what the Ukrainian army should be like, and where we can find opportunities for the army to maintain its strength," Zelensky said.

Rutte said the alliance was working with Ukraine to define the guarantees, explaining that they would focus on making Ukraine's military as strong as possible and involve Western security commitments. It was "too early to exactly say what will be the outcome", he added.

Russia's foreign minister appeared to dent hopes of any potential summit, telling NBC News that "there is no meeting planned".

Sergei Lavrov said Russia had agreed to show flexibility on a number of issues raised by Trump at the US-Russia summit in Alaska last week.

He went on to accuse Ukraine of not showing the same flexibility in subsequent talks in Washington, blaming Ukraine for hindering progress toward a peace deal.

Lavrov said it was "very clear to everybody that there are several principles which Washington believes must be accepted".

He said this included no Nato membership for Ukraine and discussions of territorial issues: "Zelensky said no to everything," Lavrov said.

He was speaking after EU foreign policy chief Kaja Kallas told the BBC that Putin was seeking territorial concessions from Ukraine that were a "trap that Putin wants us to walk into".

"We are forgetting that Russia has not made one single concession and they are the ones who are the aggressor here," Kallas said.

Despite latest efforts to broker a peace deal, Russia launched one of its heaviest attacks on Ukraine in weeks on Thursday, launching 574 drone and 40 missiles in one night.

Meanwhile, a Ukrainian drone blew up an oil pumping station in the Russian region of Bryansk, halting oil deliveries along the Druzhba pipeline to Hungary and Slovakia - the third attack on the pipeline in nine days.

Hungary and Slovakia are largely dependent on the Druzbha pipeline for their oil supplies, and Budapest says it could take at least five days before operations resume. The two EU member states have complained to the European Commission.

The European Union sought to cut Russia's energy supplies after its full-scale invasion of Ukraine in 2022 and aims to phase out Russian oil and gas by the end of 2027.

Hungarian Prime Minister Viktor Orban wrote to President Trump to complain about the attack on the pipeline, and his officials posted Trump's handwritten response.

"Viktor - I do not like hearing this - I am very angry about it. Tell Slovakia."

"You are my great friend," he added.

Canada's Prime Minister Mark Carney said on Friday that his country will drop some of its billions of dollars in retaliatory tariffs on US goods, though it will keep levies on autos, steel and aluminium.

It comes a day after he and President Donald Trump spoke over the phone for the first time since the two countries missed a self-imposed deadline to reach a trade agreement.

Canada had placed a 25% levy on about C$30bn (£16bn; $21.7bn) worth of US goods on an array of products, including orange juice and washing machines.

The tax hike was in retaliation to the US tariffs on Canada, which as of August are valued at 35% on all goods not compliant with the countries' existing free trade deal.

Carney said Canada will now match the US by ending its tariffs on goods compliant with the US-Mexico-Canada free trade agreement (USMCA). He said that would "re-establish free trade for the vast majority" of goods that move between the two countries.

The decision will go into effect on 1 September, Carney said.

In a statement to the BBC's US news partner CBS, the White House said it welcomes Canada's move, adding that it is "long overdue" and the US looks forward to continuing discussions with its northern neighbour about trade and national security.

Canada is one of many countries tariffed by the US as part of Trump's global trade strategy, but it is one of only two countries - along with China - that have placed retaliatory levies on American goods in response.

Polling shows the majority of Canadians support retaliatory tariffs on the US.

Carney, who was elected in an April general election, campaigned on an aggressive "elbows up" approach to negotiating with Trump, referencing a popular ice hockey term.

Asked by reporters about whether Canada was softening its approach, Carney argued it has a better tariff deal with the US than many other countries because of the free trade carve-out.

That puts the actual tariff rate on Canadian goods at about 5.6%, much lower than the average of around 16% for other countries, he said.

"As we work to address outstanding trade issues with the US, it's important we do everything we can to preserve this unique advantage for Canadian workers and businesses," he said.

The focus for Canada, Carney said, will now be on accelerating negotiations autos, steel, aluminium and lumber, and other significant sectors ahead of a scheduled review of the USMCA free trade agreement next year.

The US has placed a 50% tariff on all steel and aluminium imports, except for those from the UK, as well as copper imports. It has also imposed a 25% on aluminium imports.

Canada, for its part, has placed 25% tariffs on American steel, aluminium and autos. Those will remain in place for now, Carney said.

Since returning to the White House in January, Trump has launched a global trade war, imposing tariffs or raising them on goods from around the world, and threatening to go higher as he works to negotiate trade deals he sees as favourable to the US.

Famine is taking place in Gaza - just a short drive away from hundreds of trucks of aid sitting idly outside its borders.

How did we get here?

The Integrated Food Security Phase Classification (IPC), backed by the United Nations, is the world's leading hunger monitor.

Its assessment that half a million people – a quarter of Palestinians in Gaza – are suffering from famine is shocking for many reasons.

Primary among them is the report's acknowledgement that this situation is "entirely man-made", with aid organisations today accusing Israel of the "systematic obstruction" of food entering the Gaza Strip.

• 'My youngest child doesn't know what fruit tastes like': Gaza residents on famine

The IPC report says that it has found that people living in the Gaza City area are experiencing famine conditions of "starvation, destitution, and death".

It also finds that starvation is spreading rapidly – with famine expected to be in much of the rest of Gaza in September, on current trends.

The report has reached its conclusion via three key indicators:

• Starvation: At least 1 in 5 households face an extreme shortage in their consumption of food
• Malnutrition: Roughly 1 in 3 children or more are acutely malnourished
• Mortality: At least 2 in every 10,000 people are dying daily because of outright starvation or the combination of malnutrition and disease

When two of these three "thresholds" are met, the IPC recognises that famine is taking place.

The IPC says the "mortality" indicator is not showing in the available data because of a breakdown of monitoring systems. It believes most non-traumatic deaths are not being recorded.

Based on the evidence that does exist, and expert judgement, the IPC has concluded that the "mortality" threshold for famine has been met.

The report was published as Gaza's Hamas-run health ministry recorded two new deaths from malnutrition, bringing the total number to 273 deaths, including 112 children.

Israeli Prime Minister Benjamin Netanyahu has repeatedly denied starvation is taking place in Gaza and has said that where there is hunger, it is the fault of aid agencies and Hamas.

Israel has accused international aid agencies like the UN of not picking up aid waiting at Gaza's border, pointing to the hundreds of trucks sitting idle.

'Entirely man-made'

After weeks of the world seeing images of starving children, with distended stomachs and protruding bones, many will feel like the signs that a famine was imminent were a long time coming.

The ability of Palestinians to access food has been complicated throughout the nearly two-year war in Gaza.

Israel has long placed restrictions on goods entering Gaza, those restrictions increased after the beginning of the war on 7 October 2023, triggered by the deadly Hamas-led attack on Israel.

However, since March 2025, the situation has deteriorated rapidly after Israel introduced a nearly three-month total blockade on goods entering Gaza.

Under significant international pressure, Israel began allowing a limited amount of goods back into Gaza in late-May.

It also introduced a new system of food distribution operated by a controversial American group called the Gaza Humanitarian Foundation (GHF) to replace the previous UN-led system of food distribution.

The GHF has four food distribution sites in militarised zones that Palestinians must walk long distances at risk, replacing the 400 distribution points in the community under the UN's system.

Finding food has become a deadly endeavour for Palestinians and they have regularly told us that they have to choose between starvation and death, referring to the near-daily shootings of people trying to get aid at GHF distribution sites.

The United Nations has recorded the killing of at least 994 Palestinians in the vicinity of GHF sites, since late May, some of the 1,760 killed trying to access aid.

The UN says the majority killed were shot by Israeli troops, something corroborated by eye-witnesses we have spoken to and medics in Gaza. Israel has repeatedly rejected the allegations.

Under this system, overseen by Israel, starvation in Gaza has expanded.

As pressure continued to grow on Israel to allow more food in, in late July it began allowing more trucks of aid into Gaza each day and introducing "tactical pauses" in fighting to allow more aid convoys to move through the territory.

More aid has entered in recent weeks and the astronomical prices of some goods in the markets reduced somewhat – though for many Palestinians, prohibitively expensive. At times the price of flour reached above $85 for a kilo, though that figure began to reduce.

The UN and aid organisations say that despite Israel loosening some of its restrictions on food getting into the Gaza Strip, it still places significant impediments and obstructions in being able to collect and distribute aid.

The organisations say what's needed is 600 trucks a day bringing goods into Gaza for people to meet their basic needs – currently no more than half of that is being allowed in.

Israel also began allowing airdrops of aid, something criticised as inefficient, dangerous, and ultimately a distraction by humanitarian organisations.

Israel's accusation that Hamas is responsible for the hunger crisis has also been criticised. Multiple reports, including an internal US government report, found there is no evidence of systematic diversion of aid by Hamas.

There is indeed widespread looting of trucks entering Gaza – but aid agencies say most of the looting is by crowds of desperate Palestinians and some organised groups trying to make a resale profit.

Ultimately, aid agencies have been repeating for months that in order to avert starvation and famine, Gaza needs to be flooded with aid entering by road and currently Israel still imposes restrictions.

Israel's response

A number of Israeli government officials have today rejected the IPC's report.

Israel's Ministry of Foreign Affairs has accused the IPC of publishing a "tailor-made fabricated report to fit Hamas's fake campaign".

The Israeli army body called Cogat (the Coordinator of Government Activities in the Territories), which is responsible for managing crossing into Gaza, called the IPC report a "False and Biased Report, Based on Partial Data Originating From the Hamas Terrorist Organization".

Among other criticisms, Israel says that the IPC "changed its own global standard", halving a threshold of those facing famine from 30% to 15% as well as "totally ignoring its second criterion of death rate".

The IPC rejected the accusations and said that it has used long-established standards that have been used previously in similar situations.

Israel's accusation that the IPC has used "Hamas data" appears to reference that some of the reporting about malnutrition in Gaza comes from the Hamas-run Ministry of Health there.

However, the ministry's data on deaths and injuries has widely been seen as reliable throughout the war.

Responses to the report from UN agencies and international leaders has been strong.

The United Nations Secretary General Antonio Guterres said that Israel, as the occupying power, "has unequivocal obligations under international law – including the duty of ensuring food and medical supplies of the population. We cannot allow this situation to continue with impunity".

The UN's humanitarian chief, Tom Fletcher, said the famine was the direct result of Israel's "systematic obstruction" of aid entering Gaza.

Meanwhile the UK's Foreign Secretary David Lammy said: "The Israeli government's refusal to allow sufficient aid into Gaza has caused this man-made catastrophe. This is a moral outrage."

On Friday, the UN Human Rights Chief Volker Türk said it was "a war crime to use starvation as a method of warfare, and the resulting deaths may also amount to the war crime of wilful killing".

Gaza City Invasion

Israel has this week authorised the call-up of tens of thousands of reservist troops to conduct its controversial invasion and occupation of Gaza City, the area where the IPC has declared famine is taking place.

Netanyahu says a takeover is the best option to defeat Hamas, end the war and to return the Israeli hostages from Gaza.

The invasion would forcibly displace an estimated one million Palestinians living in Gaza City and the areas around it. Israel has already told medics and aid agencies to make preparations to make plans to evacuate the area.

A joint statement from a number of UN organisations including Unicef, the World Food Programme and the World Health Organization expressed alarm about the planned offensive, saying "it would have further devastating consequences for civilians where famine conditions already exist.

"Many people – especially sick and malnourished children, older people and people with disabilities – may be unable to evacuate."

Serena Williams, one of the most successful athletes of all time, has spoken out about using weight loss drugs - she says, to lift the "stigma" around using such medication.

Will her outspoken comments instil a new sense of confidence in those using the drugs? And could her honesty quieten the critics?

The 43-year-old tennis star, who broke records and won 23 grand slam titles through her career, was the embodiment of fitness and athletic prowess. But, after having kids, even she, like so many of us, has admitted to struggling to shift those extra pounds.

In the end, Williams told the Today Show in the US, that she had to look at her extra weight as "an opponent". Despite "training five hours a day" and "running, walking, biking, stair climbing," she couldn't pulverise this adversary like she did to her opponents on the tennis court - so in the end, she says, she had no other choice but to "try something different".

Many of her friends were using GLP-1 - the group of medications which help with weight loss, so she decided to try it.

Williams is adamant that the medication route - she won't say which brand she is taking - wasn't easy, and certainly not a shortcut to her losing 31lb (14kg) over the past eight months.

There is scepticism about the timing of the tennis star's recent transparency - she has just become a spokesperson for Ro, a company which sells GLP-1 brands like Wegovy and Zepbound (known as Mounjaro in the UK) through its weight-loss programme, and her husband is also an investor.

Despite this and the potential side effects of taking the medication, her honesty will hit a nerve for many - she says she is speaking out to take away the shame that so many women feel when it comes to using drugs to help them lose weight.

Caleb Luna, assistant professor of feminist studies at the University of California, says having someone like Serena Williams speaking out is "a breakthrough".

They say it helps silence the critics of how "weight loss is achieved" who say that "people are taking the easy way out" by using weight loss drugs.

"It gets rid of the stereotype that these drugs are for fat people who are being lazy and incompetent.

"In that respect it's maybe a good thing."

But Caleb also says the revelation about her need to resort to using GLP-1 medication is slightly "terrifying" and makes them feel "a little bit sad". They worry that all it does is belittle hard work and dedication, instead, focussing on appearance and the pressure to look a certain way.

"She has achieved things that so few people, in our time and throughout history have achieved.

"But now it just shows how all those accomplishments can be undermined by body size.

"Scarily, weight loss seems to outshine all those record-breaking achievements."

'Healthy weight'

Williams' weight and her looks have been scrutinised throughout her life. The burden, the pressure to fit in with society's expectations does not diminish no matter how much sporting success an athlete has in their career.

And while she may be the most high profile sports star who openly uses weight loss medication, there are many others in the public eye who have spoken out.

Oprah Winfrey says she uses GLP-1 as a tool, along with exercise and healthy eating, to stop herself "yo-yoing" with her weight.

Actress Whoopi Goldberg says she lost the weight of "two people" after taking the drug, and singer Kelly Clarkson, who says she was "chased" by her "doctor for two years" before she agreed to take it, are among the dozens of stars who have been open about taking the medication.

Williams left the world of tennis behind back in 2022, when she played the final match of her career in the US Open, but she is still a powerhouse of strength and has wanted to reach what she describes as her "healthy weight" since the birth of her second child, Adina.

In her interview with the Today Show, says she felt like her "body was missing something" and she wasn't able to get down to what she felt comfortable with - despite intense training.

Dr Claire Madigan, a senior research associate in behavioural medicine at the School of Sport, Exercise and Health Sciences at Loughborough University, says elite athletes can find it hard to lose weight.

"They are used to consuming a lot of calories and when they leave the sport they can find it difficult - it needs a change in behaviour."

Dr Madigan said it was good to see that Williams mentioned her weight loss was not just down to the drug - "she did have to focus on the diet and physical activity".

She added: "It's great she is talking about how difficult it is to lose weight after having a baby."

But she wonders if Williams's message might be lost and even demotivate some women. "The drugs are quite expensive and the average person may think here is an elite athlete, she's got access to the gym, she's got time, she has a nutritionist… and she's had to use GLP-1s".

Dr Madigan also expressed concern that the potential side effects of taking the drugs - which can include gastrointestinal problems like vomiting and diarrhoea, and in rare cases, gallbladder and kidney problems - may not have been widely discussed in the publicity surrounding Williams' announcement.

Williams says she did not experience any side effects, and told Women's Health magazine that she is finally seeing the benefits of all her hard work at the gym.

"My joints are a lot better," she says, "I just had my check-up, and the doctor said everything - including my blood sugar levels - looked great."

And, even though, she's no longer breaking new ground on the tennis courts, she is still smashing her own records, with the help, she says of weight loss drugs. She's currently training for a half marathon.

"I am running farther than I ever have," she says proudly.

Additional reporting by Alex Kleiderman

FBI agents searched the home and office of Donald Trump's ex-national security adviser John Bolton on Friday, as part of an apparent investigation into the handling of classified information.

The high-profile Republican aide has been a vocal critic of Trump since quitting his first administration in 2019, and was previously accused by the White House of misusing classified information in his 2020 account of working with the president.

The FBI has not commented in detail but sources familiar with the search told CBS News it was related in part to classified documents.

Bolton - who is yet to comment on the investigation - has not been detained and no criminal charges have been filed.

Asked by reporters what the investigation was about, Trump said he did not "want to get involved" in the matter, but referred to Bolton as a "sleazebag". The president said he had not directly ordered the searches.

In an interview with NBC News, Vice President JD Vance said classified documents are "certainly part of [the investigation]" and also alluded to "broad concern" about Bolton, without offering further detail.

He said the FBI would only bring a case against Bolton if "they determine that he has broken the law" and said the investigation was not politically motivated, as Democratic politicians have claimed.

Police vehicles and FBI personnel were seen at Bolton's home in the Washington DC suburb of Bethesda, Maryland on Friday morning, some of whom were seen taking boxes inside the property.

In a statement sent to CBS, the FBI said it was conducting "authorised activity in the area".

FBI agents were also seen at Bolton's office in Washington DC.

Bolton returned to his Maryland home on Friday afternoon but did not speak to reporters outside.

In 2020, Bolton authored The Room Where it Happened, a memoir recounting his time working in the first Trump administration between 2018 and 2019, which was fiercely critical of the president.

In it, he wrote that "a mountain of facts demonstrates that Trump is unfit to be president".

The justice department accused Bolton of a "flagrant breach" of an agreement to not disclose classified matters, but the lawsuit was dropped in June 2021, by which time Joe Biden was president.

Around the time the searches began, FBI Director Kash Patel posted on X "no one is above the law". The post did not refer to Bolton specifically.

Attorney General Pam Bondi shared the post and added: "America's safety isn't negotiable. Justice will be pursued. Always."

Bolton - who served as George W Bush's UN ambassador - had his Secret Service protection stripped by the Trump administration in January, along with several other former officials who have clashed with the president.

Bolton has also publicly questioned the administration's handling of the war between Ukraine and Russia.

Trump has been highly critical of Bolton in public, accusing him of pushing for US military intervention overseas during his time as national security adviser.

Other Trump adversaries - including New York Attorney General Letitia James and Democratic California Senator Adam Schiff - have also been subjected to investigations since he returned to office.

Gaza City and its surrounding area is now experiencing famine, a UN-backed body of food security experts has confirmed.

The Integrated Food Security Phase Classification (IPC), which is used by governments and international bodies to identify hunger levels around the world, has raised its classification to Phase 5 - the highest and most severe.

It says that over half a million people across the Gaza Strip are facing "catastrophic" conditions characterised by "starvation, destitution and death".

Israel said the IPC report was based on "Hamas lies". It continues to restrict the amount of aid entering Gaza and has previously denied there is starvation in the territory.

This denial is in direct contradiction to what more than 100 humanitarian groups, witnesses on the ground, and multiple UN bodies have said.

The IPC report describes the famine as "entirely man-made" and says that an "immediate, at-scale response" is needed or there will be an "unacceptable escalation" in famine-related deaths.

It predicts that between mid-August and the end of September, famine will expand across the strip to Deir al-Balah and Khan Younis.

During this period, almost a third of the population - nearly 641,000 people - are expected to face "catastrophic conditions" in IPC Phase 5, while the number of people to face "emergency" conditions in IPC Phase 4 will likely increase to 1.14 million - or 58% of the population.

The report also projects that up to June 2026, malnutrition will "threaten" the lives of 132,000 children aged under five.

Since the start of the war, Gaza's Hamas-run health ministry has reported that 271 people have died of "famine and malnutrition" - including 112 children.

The IPC cannot officially declare famine - that is usually done by governments or the United Nations.

In response to the report, UN aid chief Tom Fletcher said the famine was entirely preventable, saying food could not get through to the Palestinian territory "because of systematic obstruction by Israel".

UN Secretary General Antonio Guterres said: "Just when it seems there are no words left to describe the living hell in Gaza, a new one has been added: 'famine'."

He described it as "not a mystery," but rather "a man-made disaster, a moral indictment, and a failure of humanity itself".

He added that Israel has "unequivocal obligations under international law - including the duty of ensuring food and medical supplies of the population".

Phillipe Lazzarini, head of the UN agency for Palestinian refugees (Unrwa), said: "This is starvation by design & man-made by the Government of Israel".

UN Human Rights Chief Volker Turk described the famine as "the direct result of actions taken by the Israeli Government", which has "unlawfully restricted" the entry of aid.

In recent months, Israel has come under widespread international condemnation for the aid situation in the Gaza Strip.

Last month, after weeks of mounting pressure, the Israeli military said it had airdropped humanitarian aid into Gaza - a move that was criticised at the time by aid agencies as a "grotesque distraction".

Other aid drops have since taken place - but warnings have been issued about their safety, with reports that civilians were hit and killed by the falling pallets.

Earlier this week, BBC Verify found 10 separate occasions where aid was dropped into an area that the Israeli military has explicitly warned people not to enter.

In addition to airdrops, Israel said it would designate humanitarian corridors for UN convoys. However, on Tuesday the UN warned that the "trickle of aid" entering Gaza was insufficient to "avert widespread starvation".

Cogat, the Israeli military body in charge of aid, says roughly 300 aid trucks are entering daily, but the UN says 600 trucks of supplies a day are needed.

The IPC report comes as Israel prepares to launch a new military offensive aimed at occupying Gaza City.

Israel's military launched a campaign in Gaza in response to the Hamas-led attack on southern Israel on 7 October 2023, in which about 1,200 people were killed and 251 others were taken hostage.

At least 62,122 people have been killed in Gaza since then, according to the territory's Hamas-run health ministry.

Most of Gaza's population has also been displaced multiple times; more than 90% of homes are estimated to be damaged or destroyed; and the healthcare, water, sanitation and hygiene systems have collapsed.