The man who was walking with the woman reacted both verbally and physically -- a "disorderly conduct," Fishel said.

"There was a confrontation, which kind of led to this ... which then led to trespass and assault," Fishel said.

One of the Penn State students who occupies the apartment and who hosted the party for about two dozen people said Tuesday that he had gone to a nearby store for supplies and was on his way back when he noticed people on the sidewalk pointing up to his apartment.

That student, who spoke on condition of anonymity, said that a little while later "a few of them" came to his door and he told them they could not come in, but then 10 or more appeared and "pushed their way in" and the assaults began.

"I said, 'Leave, leave, leave,' " he said. "They just walked right in. They were pushing people out of the way. These guys were huge."

He said five people in the apartment were struck, and about five of the group of 10 or more were involved in the altercation. "Some were just like in the doorway," he said. "Some were holding people back."

"I was being held back in the hallway by some dude who was huge," said the apartment occupant, who is 6 feet 2 inches tall and weighs 175 pounds.

He said "two kids" seated on stools at the bar in the apartment's main room "got the worst of it." One was struck on the head with a bottle, he said, and another got a swollen, black-and-blue eye. He said the young man struck in the head with a bottle went to the hospital.

Another person was kicked in the head as he lay "in the fetal position" on the floor, and two others were punched in the face. He said the intrusion lasted "like three minutes" and then the intruders departed.

The letter adds: "I am sure that the coaches want to know exactly what happened and it would be good for all of you to discuss everything so that any ambiguity is washed out. Then the coaches will be able to punish the actors accordingly. There is contact information at the bottom of this page for Tim Curley, the athletic director. He would be able to set up a meeting of this sort if you would like."