At least four California cities held protests Saturday night in reaction to George Zimmerman’s acquittal earlier in the evening, with violence reported in Oakland. Police said about 100 people demonstrated, with some in the crowd breaking windows and setting street fires. No arrests have been reported. In San Francisco, protesters marched in the city’s Mission District, while about 200 people gathered in Los Angeles in the city’s historically black neighborhood of Leimert Park, and about 40 people gathered at Sacramento's City Hall. The LAPD declared a modified tactical alert on Saturday, meaning officers could be held over their regular shift and would not respond to low-priority radio calls. Zimmerman was found not guilty Saturday night in the shooting death of 17-year-old Trayvon Martin last year.