LINCOLN, Neb. (AP) — Lincoln police are investigating a knife attack at a football tailgate after the Nebraska Cornhuskers game over the weekend.

A 28-year-old man was slashed on Saturday at a tailgate behind the Lincoln Journal Star production building. Police Capt. David Beggs tells the newspaper the attack happened after the man saw his girlfriend talking to another man. They say he went to confront her when the suspect intervened and cut him.

The victim suffered a 3¼-inch cut to his forearm. Police haven’t found the suspect and are investigating.

The Cornhuskers beat Illinois 45-14.