FIRE broke out in a two-storey weaving shed at Mirfield textile company John Cotton Mills.
Firefighters from Dewsbury, Mirfield, Brighouse and Huddersfield went to Nunbrook Mill on Huddersfield Road on Saturday.
The fire had started in two felt-processing machines. It spread to overhead ducts, which suck out hot air and wool debris from the shed.
About five workers were in the building at the time, but no-one was hurt.