In his first public comments since Thursday’s arrests in two FBI investigations of insider sports betting and poker cheating, NBA commissioner Adam Silver said Friday night he was “deeply disturbed” by the allegations involving an NBA coach, a current NBA player and a former player who is a confidant of one of the NBA’s biggest stars.

“My initial reaction was I was deeply disturbed,” Silver told an Amazon Prime reporter in a tunnel at Madison Square Garden during the first quarter between the Boston Celtics and New York Knicks.

Members of Congress sent a letter to NBA commissioner Adam Silver on Friday requesting a briefing on the league’s gambling scandal by Oct. 31, calling the allegations of illegal sports betting and game-fixing “tens of millions of dollars in fraud and theft and robbery” 

Rozier, Billups and former Cleveland Cavaliers guard and coach Damon Jones were among 34 people indicted Thursday as part of two sweeping federal investigations involving illegal sports betting and rigged poker games.

The NBA put Rozier and Billups on immediate leave from their teams Thursday and said in a statement that it would continue to work with federal authorities on the investigations, which officials said Thursday are ongoing.