FIRE experts are investigating what caused a massive blaze which broke out at a tyre compound.
Crews spent three and a half hours battling the fire at North Central Tyres on Station Road, Luddenden Foot, from 5.15pm on Wednesday.
At its peak, 25 firefighters were at the scene.
A collection of about 150 tyres in a secure compound to the side of the building were involved in the blaze.
The tyres have been destroyed and part of the building was damaged.
Investigators were back at the site yesterday morning trying to find out how the fire started.
Meanwhile firefighters were also yesterday still at Ovenden Moor, near Wainstalls, Halifax, to deal with wildfire that broke out on Saturday.
E.on, which runs the wind turbine farm there, said none of their machines have been damaged but they have been switched off until the blaze is completely out.
They are working closely with the fire brigade.
A spokeswoman said; “We’ve just got to wait and see and hope that the rain comes at the weekend.”
Moorland visitors are being urged to take extra care as weeks of dry weather have left heathland extra vulnerable to fire.
Anyone who sees any suspicious activity on the moors is being asked to call Yorkshire Water on 0845 1242424, police on 0845 6060606 or CrimeStoppers, anonymously, on 0800 555111.