CHICAGO — Former House Speaker Dennis Hastert paid hush money to conceal claims that the Illinois Republican sexually molested someone decades ago, a person familiar with the allegations said.

The person spoke to The Associated Press on Friday on the condition of anonymity because the investigation is ongoing and the allegations are not contained in an indictment issued Thursday. The specific nature of the claims was not immediately clear.

The federal indictment accused Hastert of agreeing to pay $3.5 million to keep a person from the suburban Chicago town where he was a longtime high school teacher and wrestling coach silent about “prior misconduct,” but the court papers did not detail the wrongdoing.

Several media outlets reported similar details Friday, citing unidentified federal officials.

The Los Angeles Times, which was the first to report the specifics, cited two federal law enforcement officials, one of whom said Hastert paid a male to keep quiet about allegations that the former speaker molested him back in his coaching days.