Reports from the Mission have heard "20+ shots fired" inside El Tin Tan on 16th between Valencia and Mission around 11 p.m tonight. According to MissionMission and nearby witnesses there were 5 victims at El Tin Tan, but at least three were moving and talking.

UPDATE: On the police scanner, authorities say four victims are in stable condition and one is in serious condition with 12 gunshot wounds. Cops are on the lookout for three male suspects in a "red '80s late-model Trans Am with a spoiler" - the driver, plus two men who ran out of the bar.

Update 2: The Chronicle has scant few additional details: one of the assailants may have fled in a Chevrolet Caprice station wagon. And police have yet to speculate on whether this is related to recent gang violence in the neighborhood.
[MissionMission]
[Chronicle]