A FIRE at a building under construction in west Cornwall is suspected to be arson.

Crews were sent to Truthwall Terrace in St Just at 4.12am on Sunday, a spokesperson for Cornwall Fire and Rescue Service said.

The spokesperson added: "Crews from St. Just and Penzance along with an officer attended this incident.

"Crews on arrival found a building under construction well alight, firefighters wearing breathing apparatus used main jets and a high pressure hosereel jet to extinguish the fire."

The fire service said that arson was suspected and Devon and Cornwall Police have been informed.