Officers were dispatched to a stabbing that involved two students of James Lick High School in San Jose.
According to the San Jose Police Department, the unknown suspect/s fled the scene before the police arrived.
The two students were taken to the hospital with at least one stab wound each.
One of the students was treated for non-life-threatening injuries.
The second student was treated for life-threatening injuries but has been stabilized, according to SJPD.
Police are investigating. The school was temporarily placed on lockdown and police are advising people to avoid the area.
SJPD said it is coordinating with school district officials.