Thieves netted more than £50,000 in an international credit card fraud operating from an Oxfordshire petrol station, detectives revealed today.

Thirty-two customers of the Save Service Station, in Bicester Road, Kidlington, called police when sums ranging from £150 to £6,000 appeared on their credit card statements.

Police are now trying to trace two former employees of the petrol station to interview them about the fraud. Officers stress that no-one currently employed there is under suspicion.

Investigations found that false transactions had been made as far away as the United States, Spain and the West Indies.

Police said the fraud had been carried out by making fake credit cards and imprinting details on them from existing cards.

Banks say credit card fraud is a major problem, with losses last year totalling £300m.

The Kidlington frauds took place over a ten-day period late last year.

Pc Rob Barker, of Kidlington police, said: "The card holders told me they were baffled by their statements.

"Certain transactions were carried out in places they had never even been to."

Three other men have been arrested in London on suspicion of fraud and are currently on police bail.

Pc Barker said: "The Kidlington angle is just part of this international invest- igation. Several other police forces are involved. The card details have been used over a wide area and have involved a number of people.

"The investigation is completed in Kidlington, but continues elsewhere."

Police said they understood the card companies involved were considering refunds for customers who had been defrauded.

A spokesman for Save Service Station said that they were unaware of the fraud and had no further comment to make.