The NYPD wanted to speak to the Irish fighter after footage emerged that appeared to show him throwing a railing at a rival's bus during an unannounced appearance at a press conference in Brooklyn on Thursday. He is now in police custody, having arrived at the police station at 9pm local time on Thursday. The New York Police Department told BBC Sport McGregor will see a judge after 7am (12pm BST). As the UFC 223 media day was wrapping up, 'The Notorious' made his presence felt by storming the venue which will host this weekend's card in Brooklyn, where the new UFC lightweight champion will be crowned. McGregor clearly hasn't taken too kindly to claims from UFC President Dana White that he will strip the Irishman of the 155lbs title. The bus which was attacked was the very one in which Nurmagomedov, who was involved in an altercation with McGregor's training partner Artem Lobov earlier this week, was travelling. Nurmagomedov escaped unscathed, while Michael Chiesa sustained cuts to his face in the incident and Lobov was pulled from the card for his role. Chiesa's injury is so severe he is not able to compete against Anthony Pettis in just two days' time. Ray Borg has been forced out of a bout against Brandon Moreno because of multiple corneal abrasions. Three fights in total have been pulled from the card. McGregor has not yet been charged in relation to the incident as police continue to investigate.