The FBI has been investigating and working to contain a malicious cyber incident on part of its computer network in recent days, according to people briefed on the matter.

One of China's top investment bankers has become unreachable, according to his company.

China has declared a "major and decisive victory" in its handling of the coronavirus outbreak that swept the country in recent months following an abrupt relaxation of its "zero-Covid" policy late last year.

China has imposed sanctions on two American defense manufacturers over arms sales to Taiwan, a day after Beijing pledged to take "countermeasures" in response to Washington's handling of a suspected Chinese surveillance balloon that entered US airspace late last month.