A spokesman for Robert Mueller said that the US Special Counsel's office has asked the FBI to examine claims that women were offered money to say Mueller behaved inappropriately toward them decades ago.
The spokesman, Peter Carr, issued a statement saying that "when we learned last week of allegations that women were offered money to make false claims about the Special Counsel, we immediately referred the matter to the FBI for investigation."
Carr's statement comes as Jack Burkman, a conservative lobbyist, tweeted that on Friday he "will reveal the first of Special Counsel Robert Mueller's sex assault victims. I applaud the courage and dignity and grace and strength of my client".
Burkman gained notoriety when he promoted conspiracy theories regarding the still-unsolved killing in 2016 of Democratic National Committee staffer Seth Rich. Those theories have been disputed by law enforcement officials.
The FBI declined to comment.