A man died and a woman was injured when part of a warehouse roof collapsed early Friday morning in Oakland, a fire department spokesperson said. 

Firefighters were called at 3:13 a.m. to the warehouse in the 600 block of 85th Avenue, just southeast of the RingCentral Coliseum.

A 30-by-30-foot portion of the roof collapsed and killed the man, fire spokesperson Michael Hunt said. The woman suffered minor injuries and was taken to a hospital, Hunt said.

The section of the roof that fell was about 5% of the total roof area.

"It's a big facility," Hunt said.

The roof section was over an area used by Peet's Coffee. Philz Coffee also had space in the building.

The building has been tagged as unsafe for occupation, he said. More people could have been injured if the roof collapsed an hour later when the work shift changed.

The name of the person who died was not available early Friday from the Alameda County coroner's bureau.