Conor McGregor clearly had a bone to pick with someone.

McGregor and his entourage showed up at Barclays Center in Brooklyn, N.Y., after UFC 223 Media Day on Thursday and immediately caused total chaos, resulting in at least one fighter getting injured.

Videos posted on social media show a crazy scene in which McGregor and his team attacked a van supposedly filled with fighters as it left the arena. McGregor can be seen picking up a guard rail at one point, and chairs were thrown through the van window, according to’s Ariel Helwani.

Michael Chiesa, who’s scheduled to fight Anthony Pettis this Saturday at UFC 223, reportedly suffered a laceration amid the bedlam. Khabib Nurmagomedov, who’s scheduled to fight Max Holloway after Tony Ferguson pulled out over the weekend with an injury, reportedly was in the attacked bus.

Here’s an in-depth account of the madness, via Helwani:

Here are a few videos of the craziness, via TMZ Sports:

(Warning: Videos contain strong language.)

UFC president Dana White has said this Saturday’s fight between Nurmagomedov and Holloway will be for the UFC lightweight championship, meaning McGregor will lose the title he won from Eddie Alvarez at UFC 205 in November 2016. McGregor voiced his displeasure via social media early Thursday morning.

But that might not be the only reason McGregor was ticked off Thursday afternoon. McGregor’s longtime SBG Ireland teammate, Artem Lobov, who’s scheduled to fight Alex Caceres this Saturday, reportedly was involved in a hotel altercation with Nurmagomedov on Tuesday.

UPDATE (Thursday, 3:45 p.m. ET): Dana White is not happy, and it sounds like Conor McGregor could wind up in some legal trouble because of what happened Thursday at Barclays Center.

Here are some additional details, via ESPN’s Brett Okamoto:

McGregor said Wednesday that McGregor, who didn’t compete in UFC at all in 2017 thanks in large to a boxing match against Floyd Mayweather Jr., would return to the octagon in 2018. We’ll see if this incident changes anything.

Here’s more from White, via

Thumbnail photo via Joe Camporeale/USA TODAY Sports Images