According to Costco, the device was illegally installed on a register.
According to law enforcement, the scheme involved 25 people and four companies operating in New Jersey, Pennsylvania, New York, Connecticut, and Massachusetts.
Shown on surveillance video, the suspect approaches the register and asks the clerk for a pizza. When the worker walks away, the suspect pulls a device out of his pocket and quickly installs it on the reader.
The Kutztown Police Department is warning about a skimming device that was found at a CVS on Sunday.
At this point, police in all six townships are still trying to figure out exactly when the devices were installed, but are urging anyone who visited the stores to monitor their card activity.
The Macungie Police Department released surveillance images of the suspect and his vehicle on Saturday.