A credit card skimmer was found Tuesday by a customer at a self-checkout register kiosk at a Walmart in Bayonne, according to police.

Authorities say the skimmer was reported around 10 p.m. Police released photos of the skimming device that shows it fits right over the actual card machine. When removed, the wiring can be seen.

Skimming devices are used to steal card information. They are often installed on the outside of machines but are made to look like they belong there.

This is the second skimming device reported in Bayonne in the last three weeks. In March, a card skimmer was found by a customer at a Dollar Tree store. Another card skimmer was reported earlier this month at a 7-Eleven in Cinnaminson.

Bayonne police are investigating the recent incident at Walmart. No arrests have been made yet.

MORE: Protect yourself when paying debit or credit. Here are 10 tips to prevent skimming fraud

Shoppers told News 12 they are worried. One person said he avoids the card machines all together and uses cash.

Frances Milliner told News 12 her cards have been compromised in unrelated incidents in the past.

“Very unsafe. The new world of technology… we're going to have to go back to putting our money in mason jars and putting them in socks and hiding them around the house,” Milliner said.

Experts say customers should inspect devices to make sure there has been no tampering and always monitor accounts for any fraudulent transactions.