Reading-based UGI Utilities Inc. is warning its customers about a scam involving emails claiming the customers owe money for their energy bills.

A number of UGI customers have received the emails, purportedly from either PG&E Energy or Atmos Energy Corporation, according to Joseph Swope, a UGI spokesman.

The fraudulent billing message references a fake account number and contains a link to view the customer's bill, but if recipients click on the link, it takes them to a compromised website that harbors malware, officials said.

UGI urges anyone who receives such an email to delete it immediately without clicking on any links within the message.