Justin Bieber might need to put a leash on his posse.
Police in Southampton, N.Y., confirm to E! News that members of the 19-year-old singer's entourage are being investigated for an alleged beatdown that occurred at approximately 4 a.m. on Saturday night outside the South Pointe nightclub.
Authorities were not called to the scene but a police spokesperson tells us the unidentified male victim went to the Peconic Bay Medical Center at noon on Sunday and later filed a complaint alleging assault.
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In footage obtained exclusively by E! News, Bieber, wearing a black T-shirt and red backward cap, is seen in the parking lot by his crew's SUV when the purported altercation broke out between the clubgoer and the crooner's bodyguards, but Bieber was not involved and is not considered a suspect.
Despite his penchant for getting turned away from various hot spots due to the fact he's underage, the footage also showed Bieber managing to gain entrance to the club where he was photographed in the VIP section watching a string of scantily clad beauties on the dance floor.
According to the New York Daily News, a female clubgoer subsequently tried to chat Justin up and when her male companion confronted Bieber, that's when things got heated.
A source told the paper that Justin "ripped his shirt off and went nuts... [and] was screaming."
At that point, Bieber's security team moved in and escorted him out to South Pointe's parking lot, where the alleged scuffle occurred.
Reps for the teen heartthrob and the club have yet to comment on the fracas.
Bieber has been making quite a few headlines for his nightclub outings. Last month while in Chicago on his Believe Tour, the hitmaker paid a visit to Windy City nightclub Bodi Chicago and the venue was subsequently slapped with a citation from police for allowing him inside because of his minor status.
--Reporting by Lindsay Good
For full video of Bieber's headline-grabbing nocturnal activities, watch E! News tonight at 7 p.m. and 11:30 p.m.