Robert Mueller said he was not told before the election about the scandal.

Robert Mueller said he was not told before the election about the scandal. J. Scott Applewhite/AP

FBI director briefs lawmakers on Petraeus investigation

Robert Mueller says he wasn't told of the probe before the election.

FBI Director Robert Mueller, who is facing questions over why the Obama administration was not told before the election about the investigation of former CIA director and Gen. David Petraeus, was at the U.S. Capitol on Wednesday briefing some lawmakers on the matter.

Mueller and his entourage left the building shortly before 2 p.m.

The FBI has been involved in two investigations that since have brought scrutiny on the agency itself. One of those was the extramarital affair between Petraeus and his biographer, Paula Broadwell. The other is tied to communications between Gen. John Allen, the lead commander in Afghanistan, and a Tampa-area woman linked to the Petraeus matter.

Exactly whom in Congress Mueller was briefing on Wednesday could not immediately be determined.

On Tuesday, Michael Morell, the acting director of the CIA, had been at Capitol, where he also briefed some members, including House Minority Leader Nancy Pelosi’s offices.