Sen. Richard Burr, R-N.C., right, chairman of the Senate Select Committee on Intelligence, and Vice Chairman Mark Warner, D-Va., left, listen as Attorney General Jeff Sessions testifies before the Senate Select Committee on Intelligence about his role in the firing of FBI Director James Comey and the investigation into contacts between Trump campaign associates and Russian Federation, on Capitol Hill in Washington, Tuesday, June 13, 2017.

A person familiar with Trump's tweet said the President was referencing news reports that he is under investigation and was not indicating that he's been personally informed by the special counsel that he is a target of the probe.

"I am being investigated for firing the FBI Director by the man who told me to fire the FBI Director!" The revelation led many to believe Trump was planning on firing Rosenstein from the justice department, or that the deputy Attorney General had possibly refused to fire Mueller on Trump's behalf.

Rosenstein did not explain why he issued the statement.

In an early morning tweet, the president said Robert Mueller, special counsel probing Russian interference in the 2016 presidential election, is investigating his role in Comey's dismissal.

In another early morning tweet, Trump said that despite months of investigation no proof has been presented of any collusion he may have had with the Kremlin. "Nice", the president tweeted. "That's undemocratic on its face and a blatant violation of the President's oath of office".

Yet Trump's angry tweets on Friday underscored the near-impossible challenge his advisers and legal team have in trying to get him to avoid weighing in on an active probe. News has reported that federal investigators are examining whether the president attempted to obstruct justice.

Trump fired Comey in May, just as the FBI was investigating ties between Russian Federation and the Trump campaign. "Americans should be skeptical about anonymous allegations".

The department would not comment on the record on whether Trump, who has repeatedly complained about leaks on the case, requested the statement. The same official said Rosenstein was upset about disparaging stories that may deter people from working in government.

The move was confirmed by a transition official who spoke on condition of anonymity to discuss post-election decisions.

There has been no indication that Mueller told Trump to fire Comey.

Those questions were prompted after a friend of President Donald Trump said the White House was considering firing Mueller.

According to the White House, Trump had met on May 8 with Rosenstein and Attorney General Jeff Sessions, who told their boss during the meeting they had concerns about Comey.

"If he fires Mueller, I will tell you, we are right on the brink of a constitutional crisis", the IL senator said.

"I am being investigated for firing the FBI Director by the man who told me to fire the FBI Director!" An official of Trump's transition confirmed the laywer's internal order sent Thursday.

Snowden has been living in Russian Federation since 2013 when it gave him asylum, resisting USA pressure to extradite him.

The Twitter attacks came as vice president Mike Pence hired a personal lawyer to represent him in the intensifying investigation. Pence headed the Trump transition until inauguration day. A former prosecutor, Dowd may be best known to the public for leading investigations on behalf of Major League Baseball, including a probe of allegations of improper gambling by baseball player Pete Rose that preceded Rose's lifetime ban. Cohen has worked for Trump since the mid-2000s and was active in the campaign.

Meanwhile, another lawyer, Washington veteran John Dowd, has joined the Trump legal team.