Firefighters, paramedics and a Yorkshire Air Ambulance have been called to crash between two lorries on the A629 Halifax Road in Denholme.
One driver was reported to be badly hurt and trapped in the cab of his overturned vehicle on a sharp bend.
The other lorry, travelling in the opposite direction towards Keighley, is understood to have crashed into the overturned vehicle in the incident which occurred shortly before 2pm today.
Halifax Road has been closed in both directions between the B6141 Long Causeway and Clock Lane.
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