Federal authorities have launched a criminal investigation into New Jersey Gov. Chris Christie, as well as members of his administration, a man at the center of the investigation told ABC News.

The U.S. attorney’s office in New Jersey has interviewed former Hunterdon County Assistant Prosecutor Bennett Barlyn, who claims he was fired because he objected to Christie officials dismissing indictments against political allies of the governor. Barlyn confirmed the investigation to ABC News. It was first reported by the International Business Times.

“It is true,” Barlyn told ABC News, saying he was interviewed by federal authorities at his Pennsylvania home this week. “I also provided the investigators with names of people I thought could furnish firsthand information.”

Barlyn said he was not sure whether others have been questioned for the investigation.