(CNN) Steve Bannon was interviewed by special counsel Robert Mueller's team last Friday, a person familiar with the matter said.

Friday's interview was at least the third time the estranged adviser to President Donald Trump has met with Mueller's team. The source said Bannon has never appeared before the Mueller grand jury.

The Washington Post first reported that Bannon had been interviewed Friday by the special counsel team. Its report, citing sources familiar with the session, said Bannon had been asked about comments that Roger Stone, a longtime associate of Trump, had made about WikiLeaks in 2016.

Bannon, a former White House chief strategist, left his role in the administration last year after joining Trump's campaign in a leading role through its final months. But he and the President had a falling-out in January of this year after Bannon was quoted calling an infamous 2016 meeting of a Russian lawyer, Donald Trump Jr., then-campaign chief Paul Manafort and Jared Kushner "treasonous."

Bannon also was quoted at the time saying the Mueller investigation was "all about money laundering."

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