US national security

Sources familiar with an internal probe said a chain of errors led to the accidental leak of a military operation.

Republican Oklahoma Senator James Lankford said on Sunday that a probe is "entirely appropriate".

The US National Security Adviser was unable to explain how a journalist was added to a Signal chat with US officials.

Former Democrat Tulsi Gabbard could face tough questions in US Senate confirmation hearings over past controversies.

It is not clear if President-elect Trump or his national security team were aware of the meeting.

Trump could name Rubio as his secretary of state and Noem as his homeland security secretary, US media say.

Sgt Korbein Schultz was allegedly paid $42,000 in exchange for dozens of sensitive security data.

US Secretary of Defence Lloyd Austin responded to Congress for not notifying his absence in early January.