"Oakland Police responded to a late night call that protesters had broken into and occupied a downtown building and set several simultaneous fires," the statement read. "The protesters began hurling rocks, explosives, bottles, and flaming objects at responding officers. Several private and municipal buildings sustained heavy vandalism."
Some photos from Oakland:
Prominent Democrats, including Barack Obama, Nancy Pelosi and Barney Frank have encouraged and given moral support to the mobs now destroying property in Oakland and elsewhere. See video below.
See ARRA site here for more info on Occupy Oakland.