STATE COLLEGE, Pa. - (AP) - Investigators were reviewing video footage and identified numerous suspects who could be charged withriot, attempted arson or other counts after a peacefuldemonstration over the firing of Penn State football coach JoePaterno turned unruly.

Crowds toppled a television news van and at least onephotographer was pelted with a rock when thousands of peoplegathered in downtown State College late Wednesday, police said.

"The crowd initially was a peaceful demonstration against CoachPaterno's firing. The crowd quickly turned from a peacefuldemonstration to a riotous mob," State College police said in astatement Thursday. "The mob attempted to light vehicles on fire,and tore down light posts and street signs."

Some people threw rocks, bottles and hard objects at police andcitizens, authorities said.

In the statement, police estimated the crowd totaled as many as4,000 to 5,000 people and that officers made numerous orders todisperse, but eventually had to use pepper spray. About 100 policeofficers were downtown, many wearing helmets.

Authorities did not say how many arrests had been made.

Paterno had announced earlier Wednesday that he planned toretire after the season and expressed remorse for not having donemore after he learned of sex-abuse allegations that had been lodgedagainst a former longtime assistant coach. On Wednesday night, theboard of trustees announced his immediate firing.