Emergency services at Ponden Reservoir after reports of person 'in difficulty' in water

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A major operation is underway after reports that a person has got into difficulty at Ponden Reservoir on Tuesday evening.

The reservoir is an artificial upland lake in the Worth Valley.

West Yorkshire Police were called to the scene near Keighley just before 6.00pm.

Emergency services still remain at the scene.

Officers say enquiries are still ongoing.