The robbery was reported at about 1:25 p.m. in the 3500 block of Anza Street.
The 21-year-old victim was walking home when she was grabbed from behind by two female suspects, who pepper-sprayed her in the face and grabbed her purse, according to police.
The suspects, described as between 16 and 18 years old, fled and had not been found as of this morning, police said.
Anyone with information about the case is encouraged to call the Police Department's anonymous tip line at (415) 575-4444 or send a tip by text message to TIP411.
