Two hours later a factory in Sowerby Bridge was hit in another suspected arson attack. Both are being investigated but officers could not say if they were linked.

Ten staff at Niko Distribution, Gibbet Street, had to battle flames when yobs hurled burning rags through a window at 5pm last night.
The blaze in the single-storey building spread to the ceiling and threatened to set alight cars and machinery.

Halifax fire crew manager Ross Wilson said: "There's no doubt lives were endangered. If the fire had spread before workers were able to react, the damage would have been far greater and the cost could have been huge.

"It seems these people ripped plywood from a window and threw the rags in." Four youths have since been arrested and were being questioned.
At 7pm, crews from Halifax, Mytholmroyd, Elland and Illingworth were called to Clough Works, Brow Bridge, Sowerby Bridge.

Firefighters battled a large blaze on the ground floor of an unoccupied factory, which supplied timber patterns to the foundry industry.

Arsonists had set fire to rubbish and wood and flames spread to other parts of the two-storey building. Crews spent three hours at the scene.