Rep. George Santos, the New York Republican who’s faced numerous allegations of lying about his background, is facing federal criminal charges, according to three people familiar with the situation.

Santos, who gave up his House committee assignments just weeks after he took office in January, is expected to appear in court as soon as tomorrow. In addition to misstatements about his past, he’s also contended with allegations of fraud in his business dealings.

Officials for the U.S. Attorney’s Office for the Eastern District of New York, which has been probing Santos’ activities and history, did not immediately respond to messages seeking comment Tuesday afternoon.

Santos and aides in his Congressional office also did not reply to requests for comment. CNN first reported the imminent charges.