Conor McGregor was involved in a backstage melee, and video footage appears to show the UFC star throwing a guard rail at a bus full of fighters on Saturday's card.
McGregor crashed a press conference Thursday at Barclays Center. Video showed him with a group of people causing chaos as they took an elevator to the loading dock at the arena. He was shown tossing trash cans and causing trouble during his unannounced appearance in New York.
McGregor hasn't fought for UFC since November 2016 and was stripped this week by UFC President Dana White of the 155-pound championship he had never defended. White also said this week he did not expect McGregor to attend Saturday's UFC 223 card.
McGregor profanely responded on Twitter and wrote, "You'll strip me of nothing."
McGregor is tight with UFC 223 fighter Artem Lobov, who was involved this week in a scuffle in a hotel with Khabib Nurmagomedov.
Nurmagomedov fights Max Holloway for the lightweight championship left vacant by McGregor.