A weekend arts festival turned ugly when Penn State students and alumni rioted after bars closed, tearing down street lights, smashing storefronts, even stripping naked and burning their underwear.

About 1,500 people took part in the melee early Sunday, which ended after police used tear gas and nightsticks to break up the crowd. Twenty-four people were arrested and 14 officers were injured. Three storefronts and 33 street lights were damaged. Property damage was estimated at $50,000."This is probably the most property damage of any incident I can remember in my 25 years at Penn State," said Tom Harmon, director of Penn State police services.