Offenders used two front-end loaders to damage buildings at a Perth school last night.
Police were called to Riverton Primary School about 11pm after multiple alarms were activated on the premises.
Officers found the vehicles at the school on Corinthian Road East in Riverton.
One of the front-end loaders was used to smash into the arts department, while a smaller front-end loader was also driven around the school grounds.
Damage is estimated at more than $10,000.
Anyone with information about the incident is urged to call Crime Stoppers on 1800 333 000.