Two teenagers are in hospital after a student allegedly stabbed the other at a Perth school.
Emergency services were called to Carine Senior High School about 10am on Thursday
A boy and girl, aged 15 and 16, suffered non-life-threatening injuries during the incident involving an "edged weapon".
"One student inflicted injuries against the other," West Australian Police said.
Paramedics took the girl to Perth Children's Hospital, where she remains in a stable condition, and the boy was transported to Royal Perth Hospital.
Inspector Jason Van Der Ende said it was a concerning and critical incident and teachers were forced to act as first responders.
"We don't want this sort of behaviour in our schools," he told reporters.
"Schools should be somewhere that's safe and there for our children to learn."
He said police remained with the students but declined to say if either was under arrest or whether charges had been laid.
"We really want to highlight the fact that this is a contained incident and there's no threat to the community," he said.
Premier Roger Cook said his thoughts were with the school's students and staff.
"This must have been a very distressing incident for the students that witnessed the incident and also the teachers who had to respond," he said.
The Department of Education is working with police "to resolve some sensitive and complex issues involved with this incident."
Australian Associated Press