OAKLAND (BCN) — More than a dozen people were arrested in a Friday night protest in downtown Oakland after some protesters involved committed acts of vandalism, police said this morning.

Around 6:30 p.m., a group of 300 to 400 people were marching in the downtown Oakland area when some people in the group started breaking windows, spraying graffiti and starting small fires, police said.

Several individuals in the group failed to disperse when order by officers, police said.

Oakland police requested mutual aid from other agencies at 8:44 p.m.

Police said just before 3 a.m. there we no reports of protester activity in the downtown area, and city staff had begun working to cleanup the area.

In addition to the more than a dozen arrests, police said several citations were issued during the protest.