POLICE have warned shoppers to check their bank accounts after a sophisticated credit card skimming device was discovered.

The machine was found by an alert shopper at the Asda supermarket in Whinbush Way, Darlington.

Police said last night that the skimmer may have been operating for at least two days and they had no idea how many people may have unwittingly given up their credit card details.

The device had a card reader and a small video camera to film customers as they entered their PIN details.

Full details in tomorrow's paper.