Police beefed up enforcement in San Francisco's Mission District on Thursday in response to a burst of stabbings and shootings that investigators blame on the long-running rivalry between the Norteños and Sureños street gangs.
The Mission has been relatively peaceful in the past year, police and residents said. But last week, a series of attacks on Sureños turf culminated in the fatal shooting of 24-year-old Aldo "Trigger" Troncoso early Saturday at 17th and Mission streets.
Then on Tuesday, someone trashed a sidewalk memorial of flowers and candles for Troncoso. At noon the next day, investigators believe, the gang sought payback, as someone fired at least 12 bullets at a 26-year-old man on Norteños turf on Harrison Street near 24th Street.
One bullet struck the victim, who survived. Another went through a home's front window, although no one was inside, according to neighbors. No arrests have been made in either shooting.
"These gang-bangers suck, they really do," said Jay Boronski, 40, a graduate student psychotherapist and social worker who has lived near the site of the most recent shooting for nine years. "What if I wear a hoodie one day and walk down the street and am mistaken for someone else?"
