Nebraska Public Power District is warning customers of a phone scam targeting electricity users that has spread across the country to its customers in Nebraska.

The scam involves callers claiming to be from the power company telling customers they are behind on their power bill. The scammer’s caller ID is falsified so that it appears to originate from the utility.

The caller usually threatens to cut electric service to the customer’s home, then instructs the customer to buy a prepaid debit card, load it with money and hand over the serial number.

NPPD is warning customers not to make any payment and contact the utility at 877-275-6773 to report the request. Customers are also encouraged to contact local law enforcement.