Justin Bieber Roosevelt Field Mall Madness

A Justin Bieber event at the Roosevelt Field Mall on Long Island was canceled after thousands of fans mobbed the shopping center, leading to at least one arrest Friday, according to the teen star and police.Cops busted an executive from Bieber's record company.

Bieber tweeted his fans to leave the Garden City mall because police were threatening to start arresting unruly fans.

"they are not allowing me to come into the mall. if you dont leave I and my fans will be arrested as the police just told us," he tweeted at about 4:30 p.m.

About 3,000 fans gathered outside the Justice clothing store on the 2nd tier of the mall, Nassau County Police said.

As the crowd surged toward the location, fans started aggressively pushing and shoving, Detective Lt. Kevin Smith of the NCPD said. That prompted the dispatch of 35 Nassau County Police units and several Garden City Police units to manage the crowd. Mall security closed many entrances to prevent more fans from entering.

Police canceled the event and dispersed the crowd. As many as five people suffered minor injuries, authorities said.

At about 4:32 p.m., Justin tweeted: "the event at roosevelt mall is cancelled. please go home. the police have already arrested one person from my camp. I dont want anyone hurt."Officers arrested James A. Roppo, 44, the senior vice president for sales of Island Def Jam Records, who was at the event with Bieber.

The police did not specify the charges, but said the investigation is ongoing.

His fans quickly reacted on Twitter.

BellaMimosa tweeted : "JUSTIN!!I SWEAR, YOU HAVE TO TELL THEM TO GO! YOU YOU YOU! THEY'LL JUST LISTEN TO U! DO IT!"

Bieber, 15, is a Canadian singer who was discovered on YouTube. A talent manager saw his homemade music performance videos, introduced him to Usher, and helped get him a record deal with Island, according to Billboard.