The long-running New York Jets-New England Patriots football rivalry erupted in a postgame brawl after Sunday's game at MetLife Stadium, and it was captured in a video that has gone viral.

The incident between a male Jets fan and a female Pats fan reportedly took place as the crowd exited the New Jersey stadium after the Jets’ 30-27 overtime victory over the Patriots, Deadspin reports. “Rob,” a fan and bystander who submitted the video, provided background on the incident to Deadspin.

“Fight started in the stands with two girls fighting. And moved out to where I shot the video. Beer was thrown and clothing over the balcony [sic]. Security went after the guy. Didn’t see what happened after that,” Rob told Deadspin.

The video of the brawl provides more detail on the incident. In the footage, a male Jets fan wearing green camouflage pants appears to get into a scuffle with a group of female fans. Eventually, another man manages to drag him away from the group, but a blonde female in a red-and-white Patriots jersey pursues him. When the woman pushes the male Jets fan, he responds by punching the woman in the face. The New York Daily News points out that no stadium security personnel are visible in the video. However, a Jets spokesman addressed the punch in a statement.

“We are aware of the situation and we do not tolerate that behavior. Parties involved were detained and this matter is now in the hands of the New Jersey State Police,” the spokesman told the Daily News. Furthermore, a State Police spokesman confirmed that authorities were investigating the brawl, but had yet to make any arrests.

The controversial ending to the Sunday’s Jets-Patriots game likely played a role in the altercation. Jets kicker Nick Foles attempted a 56-yard, game-winning field goal in overtime, but missed the kick. However, a Patriots special teams player “pushed” one of his teammates through the line of scrimmage in an attempt to block the kick, and was flagged for a little-known NFL statute known as the “push rule.” The Patriots were assessed a 15-yard penalty, allowing Foles to successfully attempt a shorter field goal for the win.

The video of the male Jets fan’s punch can be viewed below.