Officers from multiple districts responded to reports of a shooting at about 5:13 p.m. and found three juvenile victims suffering from gunshot wounds, according to authorities.
Police rendered aid until paramedics arrived and transported all three to a hospital.
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One victim sustained life-threatening injuries and later died at the hospital, police said. The two other victims were treated for non-life-threatening injuries.
Investigators from the San Francisco Police Department's Homicide Detail are leading the investigation.
Anyone with information is asked to call police at 415-575-4444 or text a tip to TIP411, beginning the message with "SFPD."
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