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Credit card skimmer discovered at Phoenix convenience store ATM

Here's what to look for to find a credit card skimmer.

Phoenix Police are looking for a couple of criminals that tried to steal credit and debit card information from customers at a convenience store.

Police say the couple attached a credit card skimmer to an ATM machine inside the Circle K at McDowell and 52nd Street.

MORE: 2 suspects wanted after ATM skimmer found at Phoenix Circle K

"There were at least seven people who used the machine after this," said Silent Witness Sgt. Jamie Rothschild.

Store video shows the couple walk in and head over to the ATM machine. It appears the man hooked the device up as the woman served as a lookout before she wiped down the system with her sleeve before they left.

Anyone with information on these suspects is asked to call Silent Witness at 480-WITNESS or go to silentwitness.org.

Skimming devices are not new. Most of the time they are discovered outside at the gas pump.

"They are generally found inside the guts of the dispenser in the wiring,” said Arizona Department of Agriculture Associate Director Michelle Wilson.

Last year 57 skimmer devices were discovered in Arizona down from 88 the previous year.

"These devices can store between 100 and 5,000 credit card numbers,” said Wilson.

Officials say the best thing to do when paying for gas is to use cash or go inside and pay at the cash register. If you do pay at the pump use a credit card instead of a debit card and look closely at the device before swiping your card.

Most pumps have a seal that should not be ripped, if it is tell someone at the gas station and use a different pump.

You can also activate your Bluetooth device and check it before pumping. If a series of numbers come up it could be a crook trying to remotely access credit card numbers.