HARTFORD (AP) — Connecticut officials are warning residents about a scam targeting customers of the state's largest utility.

Attorney General William Tong and Consumer Protection Commissioner Michelle Seagull issued the warning.

They say that according to Eversource, scammers are calling customers demanding to install a new meter and threatening to shut off power if they are not immediately paid $300.

Tong and Seagull say threatening service disconnection is a common scam and people have previously impersonated other utilities to try to get access to credit card information.

Tong says a utility will not ask for instant payment and cannot threaten to shut off power without prior warning. He says residents who receive this call should hang up and not pay anything.