POLICE have warned shoppers after a device that could steal credit card information was discovered at a Walmart and Dollar General store.

Two men were reportedly arrested after the gadget was found at the store in Linda, California, around 40 miles north of Sacramento.

Robert Wisek, 39, and Alexandru Capatina, 28, were arrested by detectives from the Yuba County Sheriff’s Office, according to a police post on Facebook.

These men were taken to the Yuba County Jail on suspicion of burglary.

The investigation started on February 14 when staff at a Walmart store reported that a skimming device was found at a checkout.

Police said they reviewed security footage and saw two suspects enter the store and place devices on self-checkouts on February 11.

Investigators also caught the suspects’ vehicle and license plate number.

License plate reader cameras tracked down the vehicle to a Dollar General store in Yuba County on McGowan Parkway.

“Concerned that a similar crime may have occurred there, detectives responded to the Dollar General and discovered that a second skimming device had been installed, strongly suggesting a connection to the Walmart incident,” police said.

A search warrant was issued a few days after this incident.

Yuba County Sheriff’s and Sacramento County Sheriff’s searched a property at the 3400 block of Mayfair Drive in Sacramento.

Both men were found and arrested however the investigation is still ongoing.

“If you think you are a victim of stolen credit card information or identity theft, please contact your local law enforcement agency,” cops warned.

Card skimmer scams are a big retail problem as companies have lost more than $1 billion each year, according to the FBI.

These devices look almost identical to card readers and they fit over the original machine.

Despite this, shoppers can look out for certain features to spot these fraudulent devices.

A card reader is concave in shape, or curves inwards, while a skimmer will curve outwards.

Some scammers will use a keypad overlay or a device that fits directly over the original keypad.

This technology can record a customer’s strokes as they type out their information.

Shoppers should always look for irregular features, like a broken security seal or if the card reader is off in color, to protect their money.

The U.S. Sun has reached out to Walmart, Dollar General, and the Yuba County Sheriff’s Department.