Thousands of dollars have been scammed out of four Rotorua residents bank accounts this week.
Inspector Brendon Keenan said four people had reported a phone call which ended with between $900 and $1000 taken from each person.
The scammers claimed to be from Western Union, which Rotorua has two of, and "sweet-talked" the victims into transferring money from their accounts.
None of the victims had any prior association to Western Union.
The victims were also told if they transferred a certain amount of money it would protect against scammers.