The most recent robbery was reported at about 2:30 p.m. Monday at a bank in the 700 block of Irving Street. An employee at a nearby business said the robbery occurred at a Citibank at 701 Irving St.
The woman went into the bank, pulled out a gun and pointed it at a teller, demanding money. The teller complied, handing over an undisclosed amount of cash, police spokesman Officer Albie Esparza said.
The robber matched the description of a woman who robbed the SF Fire Credit Union at 565 Buckingham Way, near the Stonestown Galleria Mall, twice last month. The robberies occurred on July 15 and July 25, police said.
In both cases, a woman entered the bank armed with a gun and fled with cash. In one robbery, she fled in a white, two-door late-1990s car, possibly a Chevrolet, according to police.
"It appears to be the same person," Esparza said, adding that the three robberies all had "the same M.O."
The suspect is described as a black woman in her mid- to late 30s who is between 5 feet 5 inches and 5 feet 7 inches tall, weighs about 200 pounds, and has her hair in cornrows down to her neck, police said. No one was injured in any of the three robberies.
Anyone with information about the suspect or her whereabouts is encouraged to call the Police Department's anonymous tip line at (415) 575-4444 or send a tip by text message to TIP411.