OAKLAND, Calif. - About 300 people were arrested Saturday during a chaotic day of Occupy protests that saw demonstrators break into City Hall and burn an American flag, as police earlier fired tear gas and bean bags to disperse hundreds of people after some threw rocks and bottles and tore down fencing outside a nearby convention center.

Dozens of police officers remained on guard outside City Hall around midnight following the most turbulent day of protests since November, when Oakland police forcefully dismantled an Occupy encampment.

An exasperated Mayor Jean Quan, who faced heavy criticism for the police action last fall, called on the Occupy movement to "stop using Oakland as its playground."

AMES, Iowa - Royce White had 18 points and nine rebounds as Iowa State upset fifth-ranked Kansas 72-64 on Saturday, snapping the Jayhawks' winning streak at 10 games.

Melvin Ejim added 15 points for the Cyclones (15-6, 5-3 Big 12), who had lost 13 straight to Kansas since their last victory in 2005.

White, a 39 percent free thrower shooter in Big 12 games, hit a pair to put Iowa State up 64-59 with 1:47 left.