A BART police officer notified Richmond police at about 10:10 p.m. that he had heard a shot and that someone told him a man had been hit by gunfire, Richmond police Sgt. Nicole Abetkov said.
Richmond officers responded and found a man down near 19th Street and Nevin Avenue, just east of the BART station, with a gunshot wound to his torso, Abetkov said.
He was pronounced dead at the scene.
Abetkov said the shooter might have fled on a bicycle.
BART surveillance footage is being reviewed to see if the shooting was captured on video, she said.
The victim's name is being held until family members have been notified, Abetkov said.