Special counsel Robert Mueller's team, which is investigating Russian interference in the 2016 election and possible collusion between the Trump campaign and the Kremlin, interviewed former White House chief of staff Reince Priebus on Friday.

Priebus' lawyer William Burck confirmed the interview had occurred, Politico reported.

"Mr. Priebus was voluntarily interviewed by Special Counsel Mueller's team today. He was happy to answer all of their questions," Burck said.

In September it was reported that Mueller was interested in interviewing White House aides including Priebus as part of his investigation.

Priebus may have information regarding Trump's firing of former FBI Director James Comey in May. Priebus was one of the aides Trump requested to leave the Oval Office after a meeting with Comey in February, Comey told the Senate Intelligence Committee in June. Comey said during that meeting after the aides had left, Trump had asked him to discontinue the investigation of Flynn.

Priebus may also possess knowledge about former national security adviser Mike Flynn, who was fired in February after it was disclosed he lied about his contacts with Russian officials.