Former FBI Deputy Director Andrew McCabe was interviewed as part of an investigation by the bureau in March 2017 for an alleged unauthorized leak to the media regarding remarks about former national security adviser Michael Flynn and President Trump.

The alleged leak involved a “statement overheard in early February 2017,” according to documents released by the FBI on Monday. FBI

McCabe and others, who are not named, are listed as witnesses to the alleged information leak.

No other information was revealed, and it is unclear what information was allegedly leaked, or what the FBI determined and thus recommended in the situation.

The FBI’s Office of Public Affairs received the complaint about the alleged leak, and an investigation appears to have been opened on March 20, 2017.

The new revelation was included in a batch of documents released Monday related to an internal investigation of McCabe.

McCabe was fired from the FBI in March after Justice Department’s inspector general determined that he misled investigators about the role he had in leaking information to the Wall Street Journal in October 2016 about the investigation into the Clinton Foundation.

He “lacked candor” on four occasions when interviewing with internal investigators, the IG report said.

In April, it was revealed that the Justice Department IG had referred its findings to the U.S. attorney’s office in Washington for possible criminal charges. Federal prosecutors have since been using a grand jury to investigate McCabe.

A spokesperson for McCabe declined to comment.

Editor's note: This report has been updated to clarify that McCabe was identified a witness, and wasn't the subject of the leak investigation.