Firefighters spent more than five hours tackling a large blaze, believed to have been started deliberately, at a derelict building in Liversedge last night.
Flames were licking the outside of the former dye works in Miry Lane when crews arrived shortly before 10pm.
They battled to stop the fire from spreading to terraced houses nearby.
Watch commander Aldene Woodward, of Cleckheaton fire station, said the building had been targeted by arsonists at least six times in the past two years.
She said: "I don’t know who’s setting fire to it but they are putting themselves at significant risk and the lives of firefighters trying to protect the houses nearby."
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