Special counsel Robert Mueller has met with former White House chief strategist Steve Bannon to discuss Trump associate Roger Stone’s relationships with members of the Trump campaign.

Bannon was asked about alleged comments from Stone regarding whether he knew in advance about WikiLeaks' email dump during the 2016 presidential campaign, the Washington Post reports. Stone has faced scrutiny from investigators after he appeared to anticipate the publication of stolen emails from Democratic officials on the WikiLeaks website.

But Bannon was tight-lipped when approached by the Post, and did not provide the outlet with any additional details about his meeting with Mueller.

“Mueller’s team has been very professional and courteous,” Bannon said, per the Post. “Out of respect for the process, I will not discuss my interviews with them, but people shouldn’t believe everything they read.”

Stone has rejected that he had any advance knowledge of the release of Podesta’s emails, and his attorney said Tuesday that Stone has not been contacted by Mueller.

It was also reported Tuesday that Stone has taken two polygraph tests related to Mueller’s probe, and his legal team believes it demonstrates he will be able to easily answer questions from the special counsel if he is invited to testify.

Mueller is examining Russian interference and whether the Trump campaign colluded with the Kremlin during the 2016 election.