As impatient fans awaited entry into Hot 97 Summer Jam, a large and unfortunate riot erupted, causing the deployment of State Police and SWAT — and their ever-so frequent teargas grenades. The event was hosted at Metlife Stadium in East Rutherford, New Jersey.

Fans were seen throwing bottles at the law-enforcement authorities, among other various items who were readily equipped with riot gear.

At least one New Jersey state trooper was injured during the small riot, thankfully.

New Jersey Police issued a statement on the incidents:

“This evening, security personnel at one of the entrance gates to MetLife Stadium were confronted by crowds attempting to illegally enter the sold out Summer Jam concert by climbing over fences and forcing their way through security personnel. The gates have been shut and troopers on site have called for assistance from several nearby stations to help maintain order. Troopers and stadium security officials are insisting that all people outside of the gates depart the MetLife grounds to avoid congestion when the concert lets out. There is no number of arrests available at this time.”

Take a look below for some of the footage, as well as the pictures above.

WATCH:

Police RIGHT NOW outside of Hot 97 Summer Jam…. pic.twitter.com/JKHGOZRCAq

— DJ Akademiks (@IamAkademiks) June 8, 2015