East London arrests made over widespread fraud
Raids took place across Tower Hamlets as police arrested three 18-year-olds on suspicion of fraud.
It follows allegations of more than 300 elderly people being tricked out of savings worth up to £1million in the south-west of England.
Police have been carrying out a three month investigation into the allegations which sees fraudsters claim cash is needed of a forensic investigation.
It is then either couriered to the scammers or transferred electronically.
The investigation team said the fraud began in the south-east of England before spreading wider.
Det Ch Insp Will White, of the crime unit Zephyr, said: "Today's arrests should provide some reassurance that we are working with colleagues in forces in the south west to tackle this despicable form of crime which preys in the main on the elderly and vulnerable."
The homes searched were at Quaker Street and Thrawl Street.