If you've paid at the pump at a Shell station recently, you may want to keep an eye on your credit card statements.

A warning went out from the Shell Fraud Prevention Department that skimming devices have been found at their gas stations in several areas of Florida, including Palm Beach County. The warning does not list specific stations.

The devices are put inside the pumps and can't be seen by customers pumping gas.

This is the latest chain to report dealing with skimmers. In April, Hess announced skimmers were found at 16 Florida locations including at least seven in Palm Beach County and the Treasure Coast.