South Africa's government says it has received distress calls from 17 citizens who have joined mercenary forces in the Russia-Ukraine conflict.

The men are between the ages of 20 and 39 years and are trapped in Ukraine's war-torn Donbas region.

President Cyril Ramaphosa has "ordered an investigation into the circumstances that led to the recruitment of these young men into these seemingly mercenary activities," a government spokesman said. The statement did not say which side of the conflict the South Africans were fighting for.

Working as a mercenary or fighting on behalf of another government is illegal in South Africa, unless the government authorises it.

The men were lured to join the mercenary forces under the pretext of lucrative contracts, the government said.

Spokesman Vincent Magwenya added the South African government is working through "diplomatic channels" to secure their return.

Magwenya said 16 of the men were from KwaZulu-Natal and one from the Eastern Cape.

"President Ramaphosa and the South African government strongly condemn the exploitation of young vulnerable people by individuals working with foreign military entities," he added.

The BBC has found evidence to suggest the Kremlin is working to expand its sphere of influence in Africa.

Africa Corps, a Russian mercenary group controlled by the Russian Ministry of Defence, has effectively replaced the rival military group Wagner in West Africa, after its leader Yevgeny Prigozhin was killed in a plane crash.

In August, the South African government issued a warning to young women not to fall for social media recruitment opportunities promoting jobs abroad, particularly in Russia.

A BBC investigation found young women had been taken to the Alabuga Special Economic Zone in the Republic of Tatarstan in Russia to work in a drones factory.

It is estimated more than 1,000 women have been recruited from across Africa and South Asia to work in Alabuga's weapons factories.

In September, Kenyan police said they had rescued more than 20 people from a suspected trafficking ring that had lured them with job offers in Russia but intended to send them to fight in Ukraine.

Ukraine has previously said that it was holding citizens of various countries - Somalia, Sierra Leone, Togo, Cuba and Sri Lanka - at prisoner-of-war camps.

The death toll from flooding caused by one of the strongest typhoons this year in the central Philippines has risen to at least 114, authorities said on Thursday.

Typhoon Kalmaegi has flooded entire towns on Cebu, the region's most populous island, where 71 deaths were reported. Another 127 are missing and 82 injured, officials said.

Cebu provincial authorities reported an additional 28 deaths, which were not included in the tally released by the national civil defence office, according to AFP news agency.

Kalmaegi left the Philippines on Thursday morning and is currently moving toward central Vietnam, where residents are still reeling from floods that have already killed dozens of people.

Most of the deaths were due to drowning, reports said. The storm sent torrents of muddy water down hillsides and into towns and cities.

Damage to Cebu's residential areas was extensive, with many small buildings swept away and a thick carpet of mud left by the retreating floodwaters.

Local officials described the havoc wrought by the storm as "unprecedented".

Residents returning to their destroyed homes are reeling from the deadly floods earlier this week.

Jel-an Moira Servas, a business owner who lives in Mandaue city, told the BBC that she found herself waist-deep in water within minutes when her house became flooded. She quickly evacuated with her family, bringing only light items like food and electronics.

"Right now, the rain has completely stopped and the sun is out, but our houses are still filled with mud, and everything inside is in shambles," she said. "We don't even know where to start cleaning. I can't even look at it without crying."

The national disaster agency said more than 400,000 people had been displaced by the disaster in Cebu, home to 2.5 million people.

The official death toll also includes six crew members of a military helicopter that crashed on Mindanao island, south of Cebu, after it was deployed to assist in relief efforts on Tuesday.

Carlos Jose Lañas, a volunteer rescuer, told the BBC that despite preparing for the worst case, they were caught off-guard by the extent of the flooding.

"This is the worst flood I've ever experienced," the 19-year-old said. "Almost all the rivers here in Cebu overflowed. Even emergency responders did not expect this kind of scenario."

"The rescue operation was too overwhelming for the emergency responders around Cebu, because there were a lot of people asking for help."

Typhoon Kalmaegi, locally called Tino, is the 20th tropical cyclone this year to hit the Philippines, a country prone to powerful storms.

It comes barely a month after back-to-back typhoons killed over a dozen people and wrought damage to infrastructure and crops.

Super Typhoon Ragasa, known locally as Nando, struck in late September, followed swiftly by Typhoon Bualoi, known locally as Opong.

In the months before, an extraordinarily wet monsoon season caused widespread flooding, sparking anger and protests over unfinished and sub-standard flood control systems that have been blamed on corruption.

Typhoon Kalmaegi left the Philippines at 00:30 local time (16:30pm GMT) on Thursday morning.

It has since strengthened, with maximum sustained winds increasing from 150 km/h to 155 km/h.

It is expected to make landfall in central Vietnam on Friday morning, according to forecasts. More than 50 flights there have been cancelled or rescheduled.

Vietnam has already been battling with a week of flooding and record rains that burst riverbanks and flooded some of the country's most popular tourist spots.

Thailand is also bracing for the storm's impact, with local officials warning of possible flash floods, landslides and river overflows caused by Kalmaegi.

Drivers of electric vehicles (EVs) could be facing a new tax in next month's Budget.

With pressure on the chancellor to find tens of billions of pounds in additional revenue, the BBC understands there have been "conversations" within government about the possibility of a new levy on EVs.

A government spokesperson told the BBC: "Fuel duty covers petrol and diesel, but there's no equivalent for electric vehicles. We want a fairer system for all drivers."

The statement follows a report in the Daily Telegraph, that the Budget would include a new pay-per-mile charge for electric vehicles.

According to the Telegraph EV drivers could be charged 3p per mile, on top of other road taxes, amounting to an extra £12 on a journey from London to Edinburgh. Drivers of hybrid cars would also be charged, but at a lower rate.

The paper says the idea is that owners would have to estimate, and pay for, their road usage for the year ahead. If, at the end of the year, they had driven fewer miles they would have a credit to carry over, but if they had driven more they would face a top-up charge.

Drivers of petrol and diesel vehicles pay fuel duty, so the transition to electric vehicles leaves a shortfall in government revenues, which are already under significant pressure.

Since April of this year, electric cars stopped being exempt from vehicle excise duty, due to a change made in the 2022 Budget.

"We want a fairer system for all drivers whilst backing the transition to electric vehicles," a government spokesperson told the BBC.

"It is right to seek a tax system that fairly funds roads, infrastructure and public services," they added.

However, the government was still backing the transition away from petrol and diesel, they said, pointing to £4bn in support already given, including grants to cut upfront costs by up to £3,750 per eligible vehicle,

"We will look at further support measures to make owning electric vehicles more convenient and more affordable," they said.

There has been growing concerns about the emerging "tax gap" from more petrol and diesel cars coming off the roads.

That has put pay-per-mile systems in the spotlight, but there has been push back from some quarters.

Edmund King, AA president, said while the government was losing fuel duty revenue, it should "tread carefully unless their actions slow down the transition to EVs".

He added that car sales indicated that the government's own zero emissions target would not be met this year, and that the detail of the proposal was needed "to ascertain whether these new taxes will be equitable or a poll tax on wheels".

Headaches are something almost all of us deal with at some point.

They can last from a couple of minutes to days and the pain can be sharp, dull, throbbing or stabbing and sometimes spread beyond your head to your scalp, face or even your neck.

Dr Xand van Tulleken, who hosts the BBC's What's Up Docs wellness podcast, knows the feeling all too well and says he gets headaches once a month or every six weeks and it "feels like someone's drilling into my eyeball".

While it's easy to panic about what might be behind a bad headache, Dr Katy Munro, a GP and expert at the National Migraine Centre, says it's rarely something serious.

"It's natural to worry that something is seriously wrong, but the chances of that are actually very small," she explains.

She advises that if it's your "first or worst headache, get it checked out by a doctor," but if you're getting a pattern of milder, recurring headaches, there are a few simple things you can try at home as well as seeing your GP.

1. How big was the impact on your day?

Dr Xand says understanding your own headaches can be surprisingly helpful as they often don't have a single cause so keeping a diary can help you spot patterns and triggers.

For some people, weather such as thunder and lightning could trigger it, while for others it might be sensitivity to light.

"The worst time for me is when we're driving in the autumn and the sun is low and the sun is flickering through the trees...it really aggravates," says Dr Munro.

It's worth noting down things like:

• What you were doing when the headache started
• What you ate or drank
• How well you slept
• The weather
• For women, track your menstrual cycle, as headaches can be linked to hormonal changes

But, Dr Munro cautions that you shouldn't overdo it.

"I made the mistake of making mine very detailed, which was depressing. Instead keep it simple and maybe write a number from one to 10 to summarise the impact it had on your day.

"It's also useful to track how many crystal-clear days you have, not just the bad ones.

Your doctor can then review it to help identify patterns.

2. Use caffeine wisely

You might think that caffeine is something you should instantly avoid if you have a headache but Dr Munro says the truth is more nuanced.

In small, careful doses, it can make painkillers more effective if you are not having too much caffeine on a daily basis.

"Caffeine is a co-analgesic which means it can boost the effect of a painkiller," Dr Munro explains, but avoid it in the afternoon and evening as it can disrupt your sleep.

It's worth also thinking about your caffeine consumption more broadly - consuming lots of it every day can cause a caffeine overuse headache and if you suddenly stop, you might get a withdrawal headache.

3. Don't skip meals

What you eat and when may make a difference if you're suffering from headaches.

Dr Munro recommends following a diet similar to the Mediterranean one that is rich in protein, healthy fats and complex carbs which can help stabilise your energy levels.

You should avoid quick-release sugary snacks and definitely don't skip meals as that can be a common trigger.

Dr Munro says she found her headaches were helped by cutting out dairy and gluten, though that's not universal.

"I also found eating regularly and taking lunch to work made a difference," she says.

As well as thinking about food, Dr Munro says regular exercise, good sleep, stress management and staying hydrated can also help reduce headaches.

You should drink enough during the day so your pee is a pale clear colour and you don't feel thirsty.

4. Avoid painkillers with codeine

"There are lots of things, like painkillers or anti-nausea tablets, you can buy over the counter that may be helpful to manage headaches" says Dr Munro.

She cautions that you should avoid "anything containing codeine" as it can make some headaches occur more frequently and can worsen symptoms like nausea.

"Painkillers can work extremely well but it does depend on how severe your headache is.

"If they're becoming more frequent or intense, your GP can help you find a more suitable medication."

Make sure you don't regularly take painkillers on more than two days a week as this will reduce your risk of rebound headaches.

The first series of The Celebrity Traitors is in full swing.

The Traitors have begun their murder spree, as the faithfuls endeavour to uncover them.

Many of us like to think we could handle the pressure of being a Traitor, but which celebrity Traitor are you?

Spoiler alert: the quiz will reveal who the celebrity traitors are.

Enjoyed this quiz? Try testing your memory with our latest weekly quiz, or have a go at something from the archives.