Firefighters contained a structure fire that sparked inside of a vacant building near Saturday afternoon.
The two-alarm fire began around 2:30 p.m. in one corner of the old 20,000-square-foot Circuit City building at Mowry Crossing, fire officials said.
Alameda County Fire Department Fire Chief Sheldon Gilbert said approximately 10 units and 45 firefighters responded to the fire.
Fire crews received reports that one person was inside of the building at the time of the fire, but that the person was found safe outside of the structure, Gilbert said.
No injuries were reported and no evacuations of nearby businesses were made. The fire was "knocked down" by 3:30 p.m. , Gilbert said.
The fire is believed to have been started by homeless people living inside of the vacant building, according to a KTVU news report.
Fire officials said the vacant building has had a number of fires in the past few years since it . The most recent was on when firefighters fought off another two-alarm fire inside of the building.
The fire closed down portions of Mowry Avenue between Interstate 880 and Cedar Boulevard. The roads were re-opened by 3:45 p.m.