At least nine people have died in a fire during a club night near San Francisco.
Oakland fire Chief, Teresa Deloach-Reed said at least another 13 people were unaccounted for.
Police say the fire started at 23:30 local time on Friday (07:30 GMT Saturday) in Oakland.
The venue was hosting a concert by electronic group Golden Donna. The event’s facebook page indicates a number of people are missing.
It said the building housed artists in studios. It did not appear to be a formal concert venue.
One of the artists who lived in the building, photographer Bob Mule said he tried but failed to help a friend get out.
“I literally felt my skin peeling and my lungs being suffocated by smoke. I couldn’t get the fire extinguisher to work,” he said.
Ms Deloach-Reed told the newspaper the building had no sprinkler system.
Videos posted on social media by the fire department showed a large fire burning through the roof of the building. Three fire engines were called out.
The event’s Facebook page said the event, that featured seven acts, was to be held in a secret location in the east of Oakland that was announced only on the day it was held.