Justin Bieber Brawl: Pop Star Allegedly Involved in New York Nightclub Fight

It's another night out, and another problem for teen sensation Justin Bieber.

Based on new reports, the 19-year-old is being investigated for his alleged involvement in a New York nightclub brawl that left one club-goer injured.

According to the Daily News, Bieber arrived at South Pointe nightclub in Southampton at around 2 a.m. with an entourage that included four bodyguards.

Sources said Bieber's crew was "intimidating" and "overbearing," noting that they used over-the-top practices, like shining flashlights in the eyes of fellow patrons, to protect the star from being photographed.

"They were heavy-handed in their protection of him," one witness told the newspaper.

The trouble reportedly occurred when a female approached Bieber, who spent most of the night in an exclusive VIP section. Following the exchange, the girl's male friend allegedly got into a heated argument with the "Never Say Never" singer.

"He ripped his shirt off and went nuts," a source said of Bieber. "He was screaming."

Bieber was then reportedly led to the parking lot and picked up by an SUV, but the situation continued to escalate.

While it is unclear what happened next, the Daily News speculates Bieber's friends and security team continued the fight, which then left the unidentified male injured.

TMZ reported that he was even taken to the hospital.

Bieber's publicist denied that the singer was involved in such an incident, but reps from South Pointe admitted that the club was reviewing security footage to determine exactly what happened.

The incident is just the latest in a string of bad behavior from Bieber.

The star recently made headlines for peeing in a mop bucket, clubbing underage, spitting on fans, rubbing a cellphone on his crotch during a concert and having marijuana on his tour bus.