MMA superstar Conor McGregor glared at reporters Friday morning as he was walked out of a Brooklyn precinct after being hit with assault charges stemming from the wild tantrum he threw at the Barclays Center.

The 29-year-old Irishman  appeared worried as he was escorted from the 78th Precinct in Prospect Heights to a waiting police car, his hands cuffed behind him.

McGregor said nothing Friday, but went ballistic the day before in a non-public area of the sports arena, hurling a dolly, metal guardrail and other items at a bus following a UFC 223 press conference hyping Saturday’s bout between Khabib Nurmagomedov and Max Holloway.

Holloway has since been deemed medically unfit to fight.

At one point, McGregor tossed a hand truck at the bus — which was full of fighters on Saturday’s card —that smashed through a window and injured fighters Michael Chiesa and Ray Borg.

Chiesa suffered cuts to his face and Borg had multiple corneal abrasions, according to the UFC. As a result, both of their fights Saturday were canceled.

Also yanked from the card was McGregor’s teammate Artem Lobov for his alleged role in the fracas.

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McGregor’s temper flared following a decision by UFC officials Wednesday to strip him of his lightweight title. He was not scheduled to fight Saturday.

The violent scene was in retaliation to an encounter at a hotel Wednesday in which Nurmagomedov and his crew cornered Lobov, according to MMA Fighting.

He turned himself in to the 78th Precinct on Thursday night and was charged with assault and criminal mischief.

McGregor — who notably went 10 rounds in a loss to Floyd Mayweather Jr. last year — hasn’t competed in a UFC fight since winning the 155-pound title in November 2016.

Also busted was Cian Cowley 25, a member of McGregor’s entourage, who was also charged with assault and criminal mischief.

He and McGregor will be arraigned Friday in Brooklyn Criminal Court. Lobov was not charged.

UFC president Dana White called the scuffle “the most disgusting thing that has ever happened” in the sport’s history.

McGregor was the first fighter in UFC history to wear two belts simultaneously after winning both the lightweight and featherweight titles.