Rochester, MN (KROC AM News) - Four young men were arrested by Rochester police early Tuesday for an assault at a downtown bar.

A police spokesman says one of the men assaulted a customer at the Top Shots bar around 1 a.m. An off duty bouncer intervened and escorted the man out of the bar. That’s when three of the man’s friends confronted the bouncer and all four began assaulting him. Officers were called and they found the men in a car in a nearby parking lot and arrested them on assault and other charges. A gun was also found in the vehicle.

The customer who was assaulted was taken to St. Marys Hospital for treatment of a possible concussion.