Ankeny, IA (Minnesota News Network) -  Casey’s General Stores is issuing a warning to customers across the Midwest about a possible security issue with credit card information.

The company says it recently found a credit card skimming device on a pump at a station in Davenport, Iowa and that led to the inspection of all fuel pumps at approximately 1900 stores in Minnesota and 13 other states.

Five more skimmers were found on pumps in Nebraska. Casey’s immediately removed the devices and notified law enforcement authorities and credit card companies, and has instituted additional company-wide pump inspection procedures at all stores.