ANAHEIM (CBSLA.com) — Residents in Anaheim Friday were being warned to be wary of recent instances of utility phone scams.

The city of Anaheim said in a statement that a number of Anaheim Public Utility customers have been contacted by people impersonating the agency’s employees.

READ MORE: Día De Los Muertos Celebrations and Others Return To LA

The caller asks the customer to make a past-due, over-the-phone payment or face immediate water or power shut-off.

The statement said the impersonators are utilizing spoofing software which identifies the caller as the “Anaheim Public Utilities.”

READ MORE: Sigma Nu Fraternity At USC Suspends Member At Center Of Sexual Assault Allegations

The statement reminded residents that bills can be paid by mail, online, in-person or through the authorized automated phone system by calling (714) 765-3300.

“Anaheim Public Utilities representatives will never make unsolicited calls to customers to collect utility payments, nor will staff visit residents to solicit payment,” according to the statement.

MORE NEWS: USC Places Sigma Nu Fraternity On Interim Suspension After Reports Of 'Possible Drug-Facilitated Sexual Assaults,' Students Protest In Support Of Victims

Those who have been called were asked to report the calls by contacting Anaheim Public Utilities at (714) 765-3300.