AN investigation is underway into a 'suspicious' trailer fire.

The incident happened at around 5.20am in Ellison Fold Terrace in Darwen.

The fire service said the blaze could have been worse but the trailer owner uncoupled the trailer from his van and moved it to safety.

A fire service spokesman said: "On arrival the trailer was well alight with flames affecting an adjacent back door and the radiated heat breaking a window.

"Further damage was averted because the owner of the trailer managed to uncouple it from his van and moved the van to safety before the fire service arrived.

"The fire is thought to be suspicious and the police are investigating."

The rear of the van attached to the trailer suffered minor heat damage.