CALISTOGA (CBS SF) — Phone scammers using 911 caller ID are threatening to report victims to U.S Citizen and Immigration Services or Homeland Security if they don’t send money.

Victims are told not to hang up or the police will come to their home and arrest them.

Callers instruct the victims to use Western Union or to get a prepaid MoneyPAK card and send money.

According to officials, the scammers engage in a lot of conversation and have kept victims on the phone for hours.

The USCIS always sends notices by mail and would never call or ask for money.

Victims are being asked not call 911 to report incidents. Instead they should call the business line of their local law enforcement agency.