Roy, who both owns and coaches the Quebec City Remparts of the Quebec Major Junior Hockey League, is accused of hitting an opposing team's owner.
Police say about 50 fans of the Chicoutimi Sagueneens prevented the visiting Remparts players from boarding their team bus after a Friday night game.
Roy reportedly then got off the bus and attacked the Sagueneens owner.
Police say they will interview witnesses before meeting with Roy in the coming days.
Roy was inducted to the Hockey Hall of Fame in November.