UFC president Dana White reacts to the chaos in and outside the cage after Khabib Nurmagomedov beat Conor McGregor at UFC 229. (1:56)

LAS VEGAS -- UFC president Dana White said that Khabib Nurmagomedov's lightweight championship could be stripped depending on whether he is suspended and for how long after the fighter jumped out of the Octagon and went after Conor McGregor's jiu-jitsu coach Saturday night.

Before their UFC 229 fight, McGregor and Nurmagomedov said their feud would continue no matter what happened in the Octagon. No one thought it would continue literally seconds after the fight.

That's when a brawl inside and outside the Octagon involving both camps forced both fighters and multiple team members to be escorted out of the Octagon by security and police.

White said three members of Nurmagomedov's team involved in the incident were arrested and released late Saturday night. White said McGregor told him that he would not press charges.

White also said the Nevada State Athletic Commission is withholding Nurmagomedov's check pending an investigation but that McGregor was paid after the commission reviewed tape, interviewed McGregor and concluded there was no reason to withhold his check.

The state commission also could fine and suspend Nurmagomedov, the degree of which could result in his belt being stripped.

The fight ended in the fourth round when Nurmagomedov made McGregor tap to a rear-naked choke. Nurmagomedov, however, wasn't finished. After McGregor tapped, referee Herb Dean had to restrain Nurmagomedov and push him away from McGregor.

Nurmagomedov then pointed at members of McGregor's corner, threw his mouthpiece in their direction and started yelling at them. While he was being restrained by security, Nurmagomedov jumped out of the Octagon and went after Dillon Danis, a Bellator welterweight who also is McGregor's jiu-jitsu coach. Madness ensued, with members of both camps going after each other and having to be restrained by security and police.

During the commotion, two men believed to be part of Nurmagomedov's team -- one in a black shirt and one in a red shirt -- jumped into the Octagon. The man in the black shirt swung at McGregor from the front, while the man in red punched McGregor in the back of the head twice before security restrained him.

Khabib Nurmagomedov is restrained after jumping into the crowd Saturday night. Joe Amon for ESPN

"It's bad," White said of the melee. "There's gonna be an investigation by the Nevada State Athletic Commission, and ... there's gonna be big-money fines, and these guys are in big trouble.

"Again, we need to see how this plays out. Nobody has ever done that; nobody should ever do that."

A source told ESPN's Brett Okamoto that McGregor left T-Mobile Arena in the aftermath of the brawl.

Nurmagomedov showed up at the postfight news conference around midnight local time. While he didn't take any questions, he did make a lengthy statement before leaving.

"First of all, I want to say sorry to the athletic commission, Nevada and sorry to Vegas," Nurmagomedov said. "This is not my best side. I'm a human being, but I don't understand how people can talk about jumping on the cage when he talks about my religion, he talks about my country, he talks about my father and he comes to Brooklyn and he broke the bus and almost killed a couple of people. What about this? Why are people talking about my jumping over the cage? I don't understand. ... You cannot talk about religion, you cannot talk about nations, you cannot talk about this stuff. This is for me very important."

After the chaos had subsided, White said he told Nurmagomedov he wouldn't put the lightweight, 155-pound championship belt around Nurmagomedov's waist in the Octagon out of fear that people would throw drinks and other objects at him, potentially hurting other people in the process.

Violence was mostly contained, White said, though video of a sizable brawl in the arena concourse following the fight surfaced online. The 17-second clip shows several fights going on simultaneously, though it was unclear who was involved or whether anyone was arrested or detained.

When ring announcer Bruce Buffer announced the result of the main event, both fighters had already been escorted out of the Octagon.

The rivalry between McGregor and Nurmagomedov has been brewing for years, and it boiled over in April when McGregor attacked a bus Nurmagomedov was riding in at Barclays Center in Brooklyn, New York, before UFC 223.

At Thursday's news conference, Nurmagomedov and McGregor said they would not shake hands after the fight and that their fight was more than just a battle for the UFC lightweight championship.

"Honestly, for me, this is more than defending my title," Nurmagomedov said then. "For me, it's more than fight for the title, more than main event. For me, it's personal. Honestly, for me, it's personal. Of course, this is biggest fight in UFC history and we're going to break record numbers ... but for me, it's personal."

McGregor agreed that the rivalry between the two would extend past Saturday, which was certainly the case in the immediate aftermath.

"There is way deeper s--- than just a fight on Saturday night," McGregor said Thursday. "I'm going to settle this the noble way for myself and then see what happens after that. ... F--- peace. There will never be peace here. I always say you should aim for peace, but if you can't aim for peace, aim between the eyes. I'm gonna to aim right between that man's eyes, and this is never over. Never, ever, ever over."