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Video footage from reporters at Brooklyn’s Barclays Center shows someone said to be McGregor holding a guardrail and ramming it in the direction of a van said to be carrying his long standing rival, Khabib Nurmagomedov.
Some on Twitter said there was a warrant out for McGregor’s arrest, but an NYPD spokesperson told BuzzFeed News that no such warrant had been issued.
The spokesperson did say that police were investigating the “situation.”
According to ESPN, McGregor was looking for Nurmagomedov, whose coach, Ali Abdelaziz, made headlines earlier this week when he said McGregor “only fights when he knows he can win.” He also said Nurmagomedov was McGregor’s “daddy.”
“This motherfucker is so afraid of his daddy,” Abdelaziz teased.
In the midst of the melee, Michael Chiesa, a fellow MMA fighter, was hospitalized due to an apparent laceration to his forehead, UFC President Dana White told ESPN.
There’s speculation that the outburst was prompted by the news that the UFC would be stripping McGregor of his 2016 lightweight championship, which has gone undefended since McGregor took a break from the sport to prepare for the birth of his first child.
During a press conference on Wednesday, White said there would be “no interim champ” when Khabib Nurmagomedov and Max Holloway face off on Saturday night for the lightweight championship.
“One of these guys will be the champion,” he said, talking about Nurmagomedov and Holloway.
McGregor took to Twitter early Thursday morning to express his dissatisfaction with White’s decision.
BuzzFeed News has reached out to McGregor’s representatives for comment.