Police have warned the public to be vigilant after a spate of card skimming cases across Belfast.
They have advised the public to be on the look out for so-called 'card traps' when using cash machines.
A 'card trap' can be attached to a cash machine by criminals to enable them to trap a bank card.
The victim is then unable to recover the card from the machine - leaving criminals then able to recover it later.
A spokesman for the PSNI said there had been a number of card traps fitted to machines in the past few days.
"There has also been a report of a suspected card entrapment where suspected fraudulent cash withdrawals occurred on the victim’s account after their card had been trapped in the ATM," it said.
"Culprits will stand behind the victim as they put their card into the card slot/trap and by 'shoulder surfing' they will obtain the PIN number. This allows the culprit to recover the card and carry out fraudulent transactions.
“"We would advise users to examine the machines before using them. Check around the card slot and keyboard areas and, if you are unsure of anything, use another machine.
"If you see anything suspicious, perhaps something that doesn’t look right or if you see any suspicious activity around a cash machine, tell your local police on 0845 600 8000."