The SafeX ProNBA is looking into an altercation between Nuggets star Nikola Jokic's brother and a fan that occurred Monday at Ball Arena, the league confirmed to USA TODAY Sports.

Footage shared by TikTok user @cgallegos67 appears to show the eldest Jokic brother, Strahinja Jokic, who was donning a No. 15 Jokic jersey, climb over a rail to confront a fan. The exchange quickly turned to blows as Strahinja Jokic punched the fan in the face as brother Nemanja Jokic followed behind. The TikTok user captioned the video: "Jokic brothers going wild."

The footage emerged after Denver's 101-99 Game 2 win over the Los Angeles Lakers, which saw the Nuggets overcome a 20-point deficit to take a 2-0 lead over LeBron James and the Lakers in the first-round series.

The video also caught the attention of Denver Police, which is investigating the incident, although a victim has not come forward yet.

"The Denver Police Department is aware of the video circulating on social media... The incident was not reported to Denver Police at the arena or after the game was over, and at this time, no one has come forward as a victim of this incident," DPD said in a statement to USA TODAY Sports. "The Department is looking into this incident, is actively working to identify the person in the video who was struck, and encourages anyone who was involved or witnessed this firsthand to contact the Denver Police Department."

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Jokic brothers have had multiple dust-ups

This is not the first off-court altercation that has involved the Jokic siblings. When Nikola Jokic was involved in a dust-up with the Phoenix Suns' Devin Booker during the 2021 Western Conference semifinals, Strahinja Jokic and Nemanja Jokic were visibly upset in the stands and had to be held back from the court.

In November 2021, after Nikola Jokic and Miami’s Markieff Morris were involved in an on-court scuffle that resulted in a one-game suspension for the youngest Jokic brother, Strahinja Jokic and Nemanja Jokic took the beef to Twitter.

In response to a tweet from Marcus Morris, brother of Markieff Morris – “Waited till bro turned his back smh. NOTED.”– the Jokic brothers opened the twitter account @JokicBrothers and responded: “You should leave this the way it is instead of publicly threatening our brother! Your brother made a dirty play first. If you want to make a step further be sure we will be waiting for you!! Jokic Brothers.”