NAPA, Calif. (AP) - Three people were seriously injured after a large earthquake caused significant damage in California's northern Bay Area, at least 87 patients have been treated at one hospital.
    
The city of Napa in California wine country said in a statement Sunday that two adults and one child have critical injuries and Queen of the Valley hospital in Napa has treated 87 people. Hospital spokesman Vanessa DeGier says most patients have cuts, bumps, bruises.
    
The earthquake struck just before 3:30 a.m. about 4 miles northwest of American Canyon, which is about 6 miles southwest of Napa.
    
Napa Division Fire Chief Darren Drake says the quake caused six significant fires, including at a mobile home park. Four mobile homes have been destroyed and two others damaged.
    
Thousands are without power, buildings and roadways have been damaged, and water and gas breaks have been reported.

Officials in the city of Napa say 15 to 16 buildings are no longer inhabitable after the earthquake, and there is only limited access to numerous other structures.