Fraudsters are targetting elderly women by trying to get their bank card details off them in their own homes.
Two pensioners from Hyndburn were targetted in the space of a few days by the 'bank fraud investigators'.
The female victims received a phone call from a person claiming to represent their banks who said he needed PIN numbers. A woman then attended their homes to collect the cards.
A 78-year-old woman, of Queens Road West, Accrington, handed over her cards on Saturday, July 14 and had more than £2,000 taken from her accounts.
On Tuesday, July 17, a 97-year-old, of Edinburgh Drive, Oswaldtwistle, received the same call but she didn't allow the woman in when she came to collect her cards.
Sergeant Tim McDermott said patrols have been stepped up and residents are being advised to be extra vigilant.
He said the woman attending each address to collect the cards has been described as white, of slim build and with blonde hair.
He added: “This is a devious scam targeting elderly and vulnerable victims. I believe that someone out there must know something about these offences and would urge that anyone who does, stops to think about the impact on these victims.
“We are leaving no stone unturned in our enquiries but we need the help of the community to catch the offenders quickly so if anyone does have any information that they think might help, I would urge them to contact us.
“Our advice is always that you should never give personal details, especially bank details, to unexpected telephone callers, even if they seem plausible. Your bank or credit card providers will NEVER ask for your PIN numbers over the phone so if anyone does call and ask for this information, just hang up.”
Anyone with concerns about suspicious activity in their neighbourhood is asked to contact police on 101 or Crimestoppers anonymously on 0800 555 111.
The first offence took place at an address on Queens Road West, in Accrington on 14th July where a 78 year old victim handed over her cards and had over £2000 taken from her accounts.