Fraudsters claiming to work for telecommunications company TalkTalk have targeted two pensioners in Essex.
A 73-year-old man from Southend was contacted by a bogus caller who claimed he was due compensation but had been paid too much.
The fraudster asked the victim to download an application so the error could be corrected and stole a four-figure sum of money.
Another TalkTalk customer - a woman in her late 80s - was also targeted.
She was contacted repeatedly by someone until she agreed to hand over her bank details. The caller set up online banking on her behalf but never got access to her money because the victim refused to tell them a PIN.