The stabbing was reported around 9:20 p.m. Wednesday in the 1000 block of Durfee Avenue, according to the Los Angeles County Sheriff's Department.
Authorities said a fight occurred outside the school, resulting in a male student getting stabbed in the chest. He was taken to a hospital in unknown condition, but he's expected to survive.
The Sheriff's Department also said the victim does not appear to be a graduating student.
Footage from the scene showed a large law enforcement presence outside the campus, near the football field.
No suspect description was available, and no arrest has been made.
Further details were not immediately available.