The incident was reported at 9:35 p.m. in the 8200 block of San Leandro Street.
The building has been described by personnel on the scene as a single-story commercial structure.
Further details were not immediately available.
San Leandro St- crews battled and gained the upper hand tonight at a commercial fire. #oaklandproud #youroaklandfd pic.twitter.com/69Zj771F2M
— Oakland Firefighters (@OaklandFireLive) August 20, 2016
#video San Leandro Street. pic.twitter.com/hlGWQwtjlX
— Oakland Firefighters (@OaklandFireLive) August 20, 2016