Two men arrested over £1m 'courier' fraud across south-west England
Two further men aged 31 and 24 have been arrested as part of an inquiry into a £1m fraud in south-west England.
It is alleged the victims were contacted by a bogus police officer who persuaded them to send money by taxi or a courier driver to London.
A third man, aged 28, has agreed to voluntarily attend a police station for interview under caution.
It follows a series of raids in east London early on Monday.
Det Insp Tony Hubbard, from Avon and Somerset Police, said he believed many more people may have been targeted and hoped they would now come forward.
Last month two other men were remanded in custody as part of the three-month long police investigation.
Rahim Choudhrey and Abdul Shafee, both 18, of Tower Hamlets, east London are accused of 10 counts of conspiracy to defraud victims out of £168,000.