Firefighters were quickly pulled from the structure for safety concerns, forcing them to battle the flames from the ground and via extended ladders, according to fire officials.
Cook said building owner Keith Kim began trying to evict the nonprofit shortly after a devastating Oakland warehouse fire in December killed three dozen partygoers.
Three people who were rescued were injured.
Oakland fire Battalion Chief Erik Logan confirmed that one person was found dead in the second floor of the three-story building.
No other people were reported to be missing, Logan said.
Oakland fire crews say they do believe there was a fatality in the fire but they will have to confirm that information.
Hours later, firefighters continued with suppression efforts. They were on the third floor and said the hallways were filled with flames.
The television station reported that seven people were rescued and as many as 60 people may have lived in the building.
Firefighters are now battling a four-alarm fire in Oakland, California. Other residents told KTVU-TV reporters Monday that they escaped on their own.
According to the San Francisco Chronicle, crews arrived on the scene at 6:10 a.m.
Crews are reporting that the roof and floors are collapsing, forcing crews to withdraw from the building.
It's unclear if anyone died in today's fire.