The SFPD says:

Armed Robbery:
On April 13th at 11:00 pm, officers responded to the 600 block of 22nd St. to a call of a robbery. They met with the two victims, ages 29 and 39. The victims told the officers that they were at a party in the area and stepped outside to smoke a cigarette. As the victims were listening to music from one of their smart phones, they were approached by two suspects. One of the suspects pointed a handgun at the victims and demanded all of their property. The victims, fearing for their lives, gave up their personal belongings which included a purse, laptop bag, and cell phone. The suspects then went through the victims’ pockets and took additional items. The suspects then fled on foot, east on 22nd. The officers searched the area for the suspects but were unable to locate them that night. This incident is under investigation. (SFPD Case No.
130303471)

As a good-neighbor measure the AIC should really install some cameras that cover the blocks around their building.