Near the corner of 21st and Valencia Streets a little after 7 p.m. Tuesday night, a 17-year-old girl was stabbed several times in the torso.
"Police have also discovered that there was a fight between several people on Valencia Street between 20th and 21st streets shortly before the stabbing," reports SF Appeal. "Investigators have not yet determined if the two incidents are related."
The girls was transported to a nearby hospital to be treated for life-threatening injuries. Information about the stabbing should be directed to the SFPD's anonymous tip line at 415-575-4444 or sent via tip-by-text message to TIP411.