NBC NEWS: WASHINGTON — Federal investigators have gathered enough evidence to bring charges in their investigation of President Donald Trump’s former national security adviser and his son as part of the probe into Russia’s intervention in the 2016 election, according to multiple sources familiar with the investigation.

Michael T. Flynn, who was fired after just 24 days on the job, was one of the first Trump associates to come under scrutiny in the federal probe now led by Special Counsel Robert Mueller into possible collusion between Moscow and the Trump campaign.

NBC EXCLUSIVE: Mueller Has Enough Evidence to Bring Charges in Flynn Investigation #AMJoy pic.twitter.com/K4e4sVlyxq

— AM Joy w/Joy Reid (@amjoyshow) November 5, 2017

Mueller is applying renewed pressure on Flynn following his indictment of Trump campaign chairman Paul Manafort, three sources familiar with the investigation told NBC News.

The investigators are speaking to multiple witnesses in coming days to gain more information surrounding Flynn’s lobbying work, including whether he laundered money or lied to federal agents about his overseas contacts, according to three sources familiar with the investigation.

Mueller’s team is also examining whether Flynn attempted to orchestrate the removal of a chief rival of Turkish President Recep Erdogan from the U.S. to Turkey in exchange for millions of dollars, two officials said.

A spokesperson for the special counsel had no comment.

"Paper trail leads directly back to Mike Pence—proof Pence knew Michael Flynn was a Russian agent" @Funder on #AMJoy https://t.co/mK7L0yJI2Y

— Scott Dworkin (@funder) November 5, 2017

Flynn’s son, Michael G. Flynn, who worked closely with his father, accompanied him during the campaign and briefly worked on the presidential transition, could be indicted separately or at the same time as his father, according to three sources familiar with the investigation.

If the elder Flynn is willing to cooperate with investigators in order to help his son, two of the sources said, it could also change his own fate, potentially limiting any legal consequences.

The pressure on Flynn is the latest signal that Mueller is moving at a rapid, and steady, pace in his investigation. Last week, investigators unsealed indictments of Manafort and Manafort’s business partner Rick Gates. They pleaded not guilty.

Investigators also revealed Monday that former Trump campaign adviser George Papadopoulos had pleaded guilty to lying to federal officials and had been cooperating with Mueller’s investigation.

If the senior Flynn is charged, he would be the first current or former Trump administration official formally accused of criminal wrongdoing by the Mueller team.

So far, the probe has only ensnared campaign officials, and the White House has argued that the connection to the president is minimal. An indictment of the president’s former national security adviser and his son would scramble that dynamic.