The student the student who killed two classmates and wounded three others before shooting himself in the head on his birthday died on Friday of his wounds, the Los Angeles County Sheriff's office said in a statement.
"Nathaniel Tennosuke Berhow, 16, a Junior at Saugus High School, was being treated for a self-inflicted gunshot wound to the head, when he succumbed to his injuries. His mother was present at the time of his passing," the statement said.
Two students — a 16-year-old girl and 14-year-old boy — were killed and others injured in the shooting on Thursday, Los Angeles County authorities said.
Police and firefighters responded to reports of a shooting at 7:38 a.m. PT and arrived on the scene shortly after, authorities said during a press conference. When first responders arrived at the high school, they found six students with gunshot wounds, including the suspected shooter.
The suspect, later identified as Berhow, pulled out a gun in the high school quad and shot five students and then himself, authorities said during the press conference. A .45-caliber semi-automatic pistol was recovered at the scene and did not have any more bullets in it.
Authorities identified the other victims as two females, one aged 14 and the other aged 15, and one male who is 14 years old.
- CNBC's Elly Cosgrove contributed to this report.