Arsonists broke into the old Barrhead High building before setting the premises ablaze.

Firebugs struck at the derelict Aurs Road school on Sunday night in the latest in a series of break-ins this year, causing damage to the roof.

It is thought the intruders started the blaze by setting fire to piles of rubbish.

In February, we told how a group of youths managed to clamber on top of the building.

Thieves then snuck into the school during the summer, sneaking off with a number of items, including bikes.

BAM Construction workers are currently emptying the 46-year-old school ahead of its demolition, although a date for which has still to be confirmed.

East Renfrewshire Council confirmed it was working with Police Scotland to establish the full circumstances surrounding the incident, which took place shortly before 10pm on Sunday.

Inspector John McQuilter, who is based at Giffnock Police Station, confirmed an on-site security guard had alerted police to the break-in.

He added: “This incident is being treated as an act of wilful fireraising.

“We're looking into it and are appealing to witnesses in the area at that time to come forward to assist our enquiries.

“We're aware of the potential for people getting in there and causing damage.”

A fire service spokesman said: “The Scottish Fire and Rescue Service was alerted at 9.54pm, on Sunday, October 15, to reports of a fire within the former Barrhead High School building.

“Operations Control mobilised four appliances and firefighters used powerful hoses to tackle and extinguish the flames.

“Crews left the scene after ensuring the area was made safe.”