Police are continuing their investigation into an incident at a high school in Orelia.
Just after 11am on Tuesday, May 20, police received reports of an altercation between students at Gilmore College.
"Following the altercation, police were informed that a group of adults then attended the school," a WA Police spokesperson said.
The school was then placed into lockdown.
Police attended the scene and issued a man and a woman with move-on notices.
No injuries were reported but one male student was taken to Rockingham Hospital as a precaution.
Australia Day in Rockingham and Mandurah
Police investigate after man stabbed in the neck in Madora Bay
Teen boy tragically killed in horror Mandurah crash
18-year-old male from Lakelands charged over incident in Pinjarra
Hayden Ballantyne signs with Rockingham Rams
Mayor reassures community that 'no decision has been made' to close 4WD access at Tim's Thicket, White Hills beaches
DBCA 'sick and tired' of illegal access to Port Kennedy Scientific Park
Mandurah homeless camp goes up in flames