The stabbing was reported at 2:46 p.m. at 1450 Bush St., the location of a BatteriesPlus store, the dispatcher said.
Firefighters responded within three minutes and took the victims to San Francisco General Hospital in separate ambulances, according to the dispatcher. He did not know the condition of the victims.
An employee at a neighboring business said she saw police and fire officials go into the battery store, but did not see what happened prior to their arrival.
Police spokesman Lt. Troy Dangerfield said he did not yet have any information about the stabbing.