Robert Mueller is set to reveal more details about his Russia investigation on Friday as he faces court deadlines in the cases of two men who worked closely with President Donald Trump.

The special counsel and federal prosecutors in New York are filing court memos detailing the cooperation of longtime Trump legal fixer Michael Cohen, who has admitted lying to Congress and orchestrating hush-money payments to protect the president. And Mueller's team will also be disclosing what they say former Trump campaign chairman Paul Manafort lied about when his plea deal fell apart last month.

Cohen and Manafort are among five former Trump associates whom prosecutors have accused of lying either to federal investigators or to Congress.

The court filings will close out a week in which Mueller's team for the first time provided some details of the help they've received from former Trump national security adviser Michael Flynn. Prosecutors, who said Flynn's assistance was "substantial" and merited no prison time, disclosed that he had cooperated not only with the Russia investigation but also with at least one other undisclosed criminal probe.

The new details about Mueller's investigation are set to become public as Trump continues to lash out at the Russia investigation and those who help prosecutors. Trump singled out Cohen, accusing him of lying to get a reduced prison sentence. The president also praised another associate, Roger Stone, for saying he wouldn't testify against him, and Trump said a pardon for Manafort isn't off the table.