Conor McGregor was just escorted out of an NYPD precinct in Brooklyn -- wearing handcuffs ... and TMZ Sports has the footage.
McGregor was arrested late Thursday night for attacking a UFC bus with a dolly -- shattering a window and injuring multiple people, including UFC fighters Michael Chiesa and Ray Borg.
He was arrested for misdemeanor assault and felony criminal mischief and spent the night in the precinct.
McGregor was NOT being released -- he was being transported to court where he will be arraigned.
Also, McGregor's mug shot has now gone public.