Jackson was unloading or loading a vehicle on Pacific Avenue at Polk Street when a truck accelerated and pinned him against another vehicle, according to Officer Albie Esparza.
He was taken to San Francisco General Hospital, where he died of his injuries.
The truck's driver remained on the scene and is cooperating with police.
Anyone with information on this incident is asked to call San Francisco police at (415) 575-4444 or text a tip to TIP411 with SFPD at the start of the message.
