Police said on Tuesday around 3:50 p.m, a skimming device was discovered attached to a fuel pump at the Mobil Mart located at 55 Main Street in the Centerbrook section of Essex.
Police said the device could have been Bluetooth equipped, which would have allowed the thieves to obtain credit card information remotely.
A service technician discovered the device when they came to fix a malfunctioning key pad.
Anyone who thinks they may have any information regarding the device or who may have placed it there is asked to call police at 860-399-2100 or text TIP711 with any information to 274637. All calls will remain confidential.