Teenage boy dies after knife attack in SF’s Outer Mission; two men injured

File photo of generic hospital emergency room. Close up of sign for emergency department in hospital File photo of generic hospital emergency room. Close up of sign for emergency department in hospital Photo: ERproductions Ltd / Getty Image Photo: ERproductions Ltd / Getty Image Image 1 of / 28 Caption Close Teenage boy dies after knife attack in SF’s Outer Mission; two men injured 1 / 28 Back to Gallery

A teenage boy was killed Saturday night in a knife attack in San Francisco’s Outer Mission, authorities said.

The medical examiner’s office identified the victim as 16-year-old Josue Mejia-Sanchez of San Francisco. He was attacked around 9:42 p.m. near Mission and Geneva streets, according to the San Francisco Police Department.

Mejia-Sanchez died of traumatic head injuries, said Officer Joseph Tomlinson, a San Francisco police spokesman.

Officers responding to the scene found a 38-year-old man and a 48-year-old man suffering from non-life-threatening injuries. A witness told police that Mejia-Sanchez was driven to the hospital, where he died, Tomlinson said.

Police are searching for three male suspects ages 18 to 20.

Tomlinson said that detectives do not know what led to the attack.

Gwendolyn Wu is a San Francisco Chronicle staff writer. Email: gwendolyn.wu@sfchronicle.com Twitter: @gwendolynawu