UFC star Nick Diaz was reportedly attacked by four assailants outside a Las Vegas nightclub in the early hours of Wednesday morning.

TMZ reported that a representative from Hyde nightclub said Diaz used the bathroom at 2:30 a.m. and was confronted, having accidentally bumped into somebody. The fighter is reported to have "apologised and said he didn't want any trouble" before three other men joined the initial customer and jumped the 33-year-old.

"I didn't start it," Diaz told TMZ. "They didn't know who I was." Per ESPN's Brett Okamoto, the club has cleared up Diaz's role in the altercation:

Diaz said he would not pursue prosecution for his attackers and told TMZ that the assailants "got the worst of it."

According to TMZ, Diaz did attempt to defend himself, although he was struck in the head. The altercation is said to have turned into a melee that spilled into the Bellagio casino and culminated in the attackers "swinging chairs and brawling with club and casino staffers" before being escorted off the premises.

The hotel released a statement denying the incident occurred, per Jesse Holland of MMAFighting.com. 

Per Fox Sports' Damon Martin, Hyde has no issue with welcoming the Stockton fighter back:

Martin also suggested Diaz and brother Nate are misunderstood away from the Octagon because of their pugnacious style in it:

Diaz hasn't competed under the UFC banner since January 31, 2015, when he lost to Anderson Silva in a bout that was later ruled a no-contest because both men tested positive for banned substances in the aftermath. The American was initially hit with a five-year suspension, although that was lifted on August 1, 2016.

Prior to Nate's fight with Conor McGregor at UFC 202, Nick was involved in an incident that saw members of both camps toss bottles and cans at one another during the pre-fight press conference.