Scores of police officers in riot gear have started dismantling an encampment of protesters in a downtown plaza in a move to disperse the several hundred demonstrators who had taken up residence at the site.
A local radio station, KCBS, says that dozens of police cars, fire engines and ambulances surrounded and blocked off the area. It says that the police action came as a surprise.
Protester Katt Hoban says there were several hundred protesters at the encampment of about 200 tents. Hoban said the raid started after 200 riot police surrounded the camp.
KCBS says several tents were taken down and that protesters had been allowed to retrieve their belongings and leave before authorities moved in.
It was not immediately clear whether there had been clashes, injuries or arrests.