Donald Trump's former top advisor Michael Flynn pleaded guilty Friday to lying over his contacts with Russia, in a dramatic escalation of the FBI's probe into possible collusion between the Trump campaign and Moscow.

Donald Trump's former national security advisor Michael Flynn was to appear in court Friday after being charged with lying over his Russian contacts, as part of the FBI's probe into possible collusion between the Trump campaign and Moscow.

Investigators are probing whether former White House national security advisor Michael Flynn discussed expelling a Turkish dissident back to his country in exchange for millions...

The family of former White House national security advisor Michael Flynn has launched a defense fund to raise money for mounting legal costs in the sprawling Russia election interference probe.

Fired FBI chief James Comey has confirmed that Donald Trump urged him to drop a probe into former national security advisor Michael Flynn, in a preview of hotly awaited testimony Thursday that could rock the foundations of the presidency.

Russian President Vladimir Putin says he had only a brief and passing acquaintance with former US national security adviser Michael Flynn, though the two sat next to each other at a dinner in Moscow in 2015.

The committee said it had approved subpoenas for Cohen and for Trump's former national security advisor Michael Flynn to appear before them and supply documents.

Donald Trump, just back from his first international trip as US president, geared up to combat concerns Sunday over aides' ties to Russia including explosive reports that his son-in-law sought a secret communications line with Moscow.

President Donald Trump's former national security advisor Michael Flynn will not comply with a Senate subpoena for documents on his links to Russia and will invoke his constitutional protection against self-incrimination, a source close to Flynn said Monday.

Donald Trump's beleaguered White House was rocked Tuesday by a pair of explosive allegations -- that he personally tried to quash an FBI investigation, and that he disclosed highly classified information to top Russian officials.

A Senate panel issued a subpoena for documents from White House national security advisor Michael Flynn Wednesday, taking the sprawling investigation into links between the Trump campaign and Russia to a new level.

US President Donald Trump insisted there is no evidence he colluded with Russia after a Senate hearing that highlighted warnings that his former national security advisor was vulnerable to Russian blackmail.