At about 2:30 p.m., a train headed to the East Bay struck a male victim on the tracks at the station, BART spokesman Jim Allison said.
Emergency crews responded and were able to extract the person, Allison said. He did not know the condition of the victim, who was taken to San Francisco General Hospital.
"The initial investigation seems to point toward attempted suicide," but BART police are continuing to investigate the incident, Allison said.
The train that struck the victim has been moved out of the station. The investigation forced BART to shut down service on all trains headed to the East Bay from stations in San Francisco and on the Peninsula.
Service on all lines resumed as of 3:45 p.m., but BART was reporting residual delays.
The incident was the second to cause delays on BART this afternoon. At about 1:40 p.m., parole agents and San Francisco police chased a wanted parolee onto the tracks at the Civic Center station.
Before police officers went onto the tracks, power was shut off to the electric third rail between the Civic Center and 16th Street/Mission stations, preventing trains from traveling through that stretch.
Officers arrested the suspect a short time later on the tracks, San Francisco police Sgt. Troy Dangerfield said.
Power was restored and regular service resumed just minutes before the incident at the Embarcadero station.