Special counsel Robert Mueller is set to file new disclosures on Friday in cases involving two of President Donald Trump's former close associates, both of whom have entered guilty pleas in the probe into Russian meddling in the 2016 election.

Mueller is expected to recommend a sentence for Trump's former personal lawyer, Michael Cohen, ahead of a federal judge's final sentencing decision on Tuesday. In addition, federal prosecutors in New York will be filing a sentencing memo detailing Cohen's cooperation after his guilty plea in their separate case against him.

U.S. District Court Judge William Pauley ordered Mueller's team and the U.S. attorneys in New York to file their sentencing submissions by 5 p.m. ET.

In a separate case Friday, the special counsel's team is expected to explain why it accused former Trump campaign chairman Paul Manafort of imploding his plea deal by lying to investigators.

The filings follow a series of seismic developments in Mueller's probe of Russia's interference in the election, potential obstruction of justice and possible collusion between the Trump campaign and the Kremlin. The new activity also comes as Trump appears to be cranking up the frequency and intensity of his attacks on the investigation, which he has often decried as a "phony witch hunt."

Manafort, 69, was convicted in federal court in Virginia in August on eight criminal counts brought by Mueller that were mostly related to his work for a pro-Russia political party in Ukraine. He struck a plea agreement with the special counsel in September, on the eve of a second criminal trial, in Washington.

That agreement required Manafort to "cooperate fully, truthfully, completely, and forthrightly" with investigators. But Mueller scrapped the deal in late November, alleging that Manafort lied to federal investigators "on a variety of subject matters" after he signed the deal.

Mueller did not elaborate in that court filing about what falsehoods Manafort allegedly told investigators. In D.C. district court last week, prosecutors told Judge Amy Berman Jackson that they had not yet decided whether to lodge more charges against Manafort.

At that hearing, Jackson also set a tentative sentencing date for March 5.

The ex-campaign chief has been behind bars since June, when Jackson revoked his $10 million bail after Mueller accused him of attempting to tamper with potential witnesses.

Meanwhile, the 52-year-old Cohen appeared in Manhattan federal court last week to plead guilty to Mueller's charge that he had lied to Congress about plans to build a Trump Tower development in Moscow.

Cohen said he falsely told the Senate Intelligence Committee that the Moscow proposal "ended in January 2016 and was not discussed extensively with others" in the Trump Organization, when Cohen's discussions about the project had actually continued as late as June 2016.