Oakland police made more than 300 arrests during a tense Occupy Oakland protest Saturday, with city officials expressing frustration and outrage at the tactics of some demonstrators.

City Administrator Deanna Santana said the city "will not be bullied by threats of violence or illegal activity. ... Breaking into buildings, assaulting police officers, provoking confrontations and vandalizing property are tactics that are counterproductive and divide our community. They drain scarce city resources away from the neighborhoods in greatest need. Oakland deserves better."

Other city officials said the protests prevented police from dealing with other emergencies.

PHOTOS: Occupy Oakland

"This particular faction of Occupy ... they're very violent, and I'm going to be asking for a lot more mutual aid," Mayor Jean Quan told the Oakland Tribune. "They are hurting the neighborhoods by continuing to do this on Saturday nights."

Police in riot gear faced off with demonstrators Saturday afternoon at a rally near City Hall. Hundreds of protesters then marched toward the vacant Henry J. Kaiser Convention Center, where they began tearing down the fencing around the auditorium, and police moved to stop them.