MARION,Indiana — Police in Marion do not know how long credit card skimming devices were on gas pumps at two Circle K convenience stores. The stores at Baldwin Ave and 901 E. Bradford Street is where an employee checking the pumps found the skimmers. These are devices which steal your credit card information and pass it on to thieves. Police are asking anyone who used a credit card to purchase gas at either of the Circle K locations to contact their credit card company to make sure their cards have not been compromised.