Conor McGregor has been charged with assault by the NYPD.
McGregor was involved in an unprecedented attack at a UFC press conference.
McGregor has been formally charged with three counts of assault.
He was also charged with one of criminal mischief.
McGregor stormed a UFC press conference in New York City.
He threw guard rails at a bus carrying UFC fighters.
He smashed a window in an attack that left two athletes requiring hospital treatment.