Around 8 p.m. Friday night, a group of teenagers, both male and female, allegedly got into a fight with a guy on a Muni bus whom they then proceeded to stab multiple times in the torso with a screwdriver. The 31- or 32-year-old man was taken to SF General where he was in life-threatening condition as of Saturday.

The incident happened on a 14-Mission bus near the Precita stop. Police don't yet have anyone in custody, but they say they're reviewing Muni surveillance footage and they're on the lookout for some Hispanic males and females between the ages of 16 and 18.