The development comes as the U.S. military is drawing up options for President Trump to consider, including possible strikes inside the country.

© Adriana Loureiro Fernandez for The New York Times

An intelligence agency’s sweeping investigation shows that Moscow is closely following the anti-Kremlin activities of Russians abroad.

© Kin Cheung/Associated Press

An interrogator covertly used a power drill and handgun to menace a prisoner, without permission from the agency’s headquarters.

The British government has come under scrutiny after charges against two men accused of spying for Beijing were dropped. Here’s what to know.

Fears of U.S. surveillance drove Xi Jinping, China’s leader, to elevate the agency and put it at the center of his cyber ambitions.

Two Democrats on the House China committee noted the use of A.I. by Chinese companies as a weapon in information warfare.

Information collected during the yearslong Salt Typhoon attack could allow Beijing’s intelligence services to track targets from the United States and dozens of other countries.

The authorities provided few details about the case, the latest in a series of apprehensions in Germany of potential Chinese spies.

The Chinese Consulate in Manhattan has mobilized community groups to defeat candidates who don’t fall in line with the authoritarian state.

Jinchao Wei provided a Chinese intelligence officer with defense and weapons abilities of U.S. warships, including their vulnerabilities, prosecutors said.