Three men were injured and one was arrested on Sunday morning following a fight involving a knife in the lobby of the Mackimmie residence hall, according to University of Massachusetts police.

The alleged attacker, Jason Vassell, 23, is a UMass student and a resident of Mackimmie. Charged with two counts of aggravated assault and battery with a dangerous weapon and two counts of armed assault with intent to rob or murder, Vassell himself received a facial injury in the fight and was treated at Cooley Dickinson Hospital in Northampton.

The two victims suffered stab wounds and were treated at Bay State Medical Center in Springfield.

Police said they were in fair condition on Sunday afternoon.

Students were prohibited from entering a stairwell and from using the back door for half of the next day. At least two students filled out witness reports, but were asked by police not to talk about the incident to the press while the investigation is still underway.