City police say more than 80 people were arrested Sunday night. Crowds threw bottles at police, set small fires, broke store windows and overturned cars. Much of the violence occurred in the Oakland neighborhood that is home to Pitt's main campus.
Chancellor Mark Nordenberg says an unspecified number of Pitt students already have been charged by the campus judicial system and others likely will be as police review surveillance videos.
Nordenberg wants to "ensure that this type of disturbance is not repeated on any of our campuses ever again."
Copyright 2009 by The Associated Press