Students and staff from two classes at Halls Head Primary School have been sent into isolation following a confirmed COVID case.
In an email to parents and families, Principal Peter Beckingham said the positive case was in a Year 6 class and a Pre-Primary class on Tuesday.
It is unclear whether the infected person was a staff member or a student.
"Our school will continue to operate as per normal, with some alterations to play areas and lunch areas," Mr Beckingham said.
Halls Head Primary is one of 30 schools across WA that have been impacted by COVID.
Fuel prices surge in Perth, Mandurah
Teen boys charged over Mandurah burglaries
Tragic update in search for missing man Robert Snyder
Premier Roger Cook to leave Kwinana electorate, move to Perth
Mandurah Marine Rescue's new vessel named in memory of nun who survived 1959 boating accident
Teen dies in motorbike crash at Waroona Dam
Shark alert issued after whale carcass reported at Preston Beach
Kwinana businesses to refuse serving students during school hours
Men attacked, campervan windows smashed in East Rockingham