The incident was initially reported at about 1:30 p.m. at the station's Platform 2. The train at the station had to be held, backing up service for all lines going into and out of San Francisco, BART spokeswoman Alicia Trost said.
The train was released and regular service resumed through the station with residual delays as of shortly after 2 p.m., Trost said.
Photos posted on Twitter by BART spokesman Taylor Huckaby showed several windows smashed at the West Oakland station.
BART officials tell ABC7 News a suspect was arrested at the station.
Stay with ABC7 News for the latest details on this developing story.