UPDATED: Detectives today charged a fourth child in relation to vandalism and a fire at a Geraldton school on Sunday night.

Police have charged a Woorree boy, 14, with aggravated burglary and commit offence, stealing, criminal damage and criminal damage by fire.

A Rangeway girl, 13, Glenfield boy, 12, and a Rangeway boy, 13, have been charged with the same offences.

Police allege the children set fire to a room at John Willcock College in Rangeway before causing “extensive” damage to ground floor windows, computers, photocopiers, projectors, CCTV and numerous other items.

The damage bill is estimated at $150,000.

All three children are due to appear before the Geraldton Children’s Court at a later date.

Inquiries are ongoing and anyone with any information is asked to contact Crime Stoppers.

The school remains closed today as the clean-up and repairs continue.

Principal Julie Campbell advised parents of students to monitor social media and text messages for information on when classes would resume.