Former White House national security advisor, Michael Flynn, is reportedly moving to cooperate with a special prosecutor probing possible collusion between Donald Trump's campaign team and Russian election meddling.
Lawyers for Michael Flynn notified the president's legal team in recent days that they could no longer discuss the investigation by special prosecutor Robert Mueller, according to a report in The New York Times.
The development indicates that Mr Flynn is cooperating with prosecutors or is negotiating such a deal, the report said.
Mr Flynn's lawyers had been sharing information with Mr Trump's legal team about Mr Mueller's probe related to Russian interference in last year's ballot, which saw Mr Trump defeat his Democratic challenger Hillary Clinton.
"That agreement has been terminated," the Times' sources said.
Mr Flynn, a retired lieutenant general who previously led the Defence Intelligence Agency, became the White House national security advisor after Mr Trump took office in January.
He was forced to resign three weeks later over his Russian contacts.
Mr Mueller's investigation has already led to the arrest of Mr Trump's one-time campaign chairman Paul Manafort, his partner Rick Gates, and George Papadopoulos, a campaign foreign policy advisor.
Mr Papadopoulos pleaded guilty to lying to the FBI.
