Criminals hid bank card-skimming devices inside gas pumps — in at least one case, even completely replacing the front panel of a pump — in a recent wave of attacks that demonstrate a more sophisticated, insidious method of stealing money from unsuspecting victims filling up their gas tanks. The scam was first discovered when a California bank’s fraud department discovered that multiple bank card victims reporting problems had all used the same gas pump at a 7-Eleven store in Utah.