POLICE are investigating after more than 15 cannabis plants were found in a house after a fire.

Firefighters were called to the blaze in an upstairs bedroom at a house in St James’s Road, Blackburn, on Monday morning.

But while they were there a cannabis farm was found and police were called.

Yesterday, police confirmed they were still trying to trace the tenant.

The upstairs was badly damaged and the neighbouring house suffered smoke damage.

Anyone with information is asked to call 101.