Conor McGregor reportedly attacks rival in 'most disgusting act in history of UFC'

Conor McGregor shown lifting a railing in the video.

Conor McGregor is not on the UFC 223 fight card in Brooklyn on Saturday, but the mixed martial arts superstar still made headlines by crashing Thursday's media day and attacking a bus full of rival MMA fighters, leaving them covered in shattered glass.

Police and EMS were called according to UFC president Dana White, who said that there is a warrant out for McGregor's arrest. However, an NYPD spokesman would not confirm that there is a warrant for McGregor's arrest, instead saying that the investigation is ongoing.

'There is a warrant out for Conor McGregor's arrest,' White told reporters. 'They're looking for him right now. His plane cannot take off. He cannot leave the state of New York with this warrant. They will be grounded. I assume if they don't catch him, he'll turn himself in. You can imagine he's going to be sued beyond belief and this was a real bad career move for him.'

The Irishman was scheduled to lose his UFC lightweight belt on Saturday to the winner of the title bout between Max Holloway and Khabib Nurmagomedov, the latter of whom appeared to be the target of McGregor's rage. White previously ruled that McGregor would have to forfeit the belt to whomever won the fight because the 29-year-old has not participated in a UFC event since 2016 - nearly a year before his doomed boxing debut against Floyd Mayweather Jr. in August of 2017.

Dana White on the Conor Mgcregor brawl incident. #UFC223 #ConorMcGregor pic.twitter.com/nd59OQlpwv

— MMA Experts (@MMA_Experts) April 5, 2018

McGregor gave a convoluted reaction to White's decision on Twitter: 'You's'll strip me of nothing you's do nothing c****.'

The skirmish occurred as Nurmagomedov made his exit from the arena's bottom floor near the loading docks. As the lightweight's bus inched towards the truck elevator, McGregor and his posse attempted to climb aboard before one of them smashed a window, leaving several passengers covered in glass.

'Approximately 20 guys were apparently let in through the doors by the Mac Life guys, who were credentialed here,' White explained, referencing McGregor's brand and its employees who allegedly helped the Dublin native and his crew enter Barclays Center.

'They opened the doors for them through an entrance, they stormed the building, got down to the loading docks where the fighters were getting on the buses and started to attack the buses, throwing trash cans and dollies and things like that,' White continued. 'Broke one of the windows and cut Michael Chiesa real bad. He cut his head and cut his face. Rose Namajunas was apparently almost hit. She's super upset right now... Hurt one of our employees, broke one of our employees knuckles.'

Footage from the scene shows McGregor attempting to hurl a guard rail through the window of the van full of fighters before being prevented by security.

The Dubliner can then be seen trying to do the same with a trash can before being thwarted once again.

Some members of his team were successful in their attempts to assault the moving vehicle, however, as a number of windows were smashed by projectiles.

Specifically, UFC lightweight Michael Chiesa was injured in the fracas, suffering a laceration to his face after a chair was thrown through one of the van's windows.

McGregor continued to try to get into the van, even grabbing a guard rail at one point, but was ultimately restrained by a handful of onlookers.

Nurmagomedov, a front-runner to be McGregor's next opponent, had a run-in with Artem Lobov earlier this week, threatening him if he ever spoke his name again.

'Never say my name,' Nurmagomedov said in a clip that was later posted to YouTube. 'You got me? I didn't hear you, motherf*****.'

Lobov is a long-time friend and training partner of McGregor's and it is likely Thursday's incident was a response to this altercation.