A PRIMARY school is counting the cost of a suspected arson attack.

Vandals broke an air vent in a wall at Sunninghill Primary School, Derby Street, Daubhill, pushed in rubbish and aerosol canisters, and set it alight.

Fire crews were alerted by children playing cricket in the school yard on Sunday afternoon as fire spread through the cavity wall into a classroom.

The firemen forced a window to get inside and doused the flames, which caused minor damage. The blaze is being treated as malicious and police are investigating.

Anyone with information is asked to call Crimestoppers on 0800 555 111.

The school broke up for Easter on Friday, but keyholders were immediately called to the scene.

A fire service spokesman said the blaze was quickly contained and only caused minor damage to the classroom's outer and inner walls.