A 92-year-old woman has been conned into handing over tens of thousands of pounds worth of gold and jewellery on her doorstep to a man claiming to be a police officer.

The woman from Swainsthorpe received a call on Wednesday February 21 from someone claiming to be a 'Detective Sergeant John Carod' and he told her he had 'intercepted some males who had her credit card details'.

He then asked the victim to put together all her gold items and jewellery and he would arrange for them to be collected.

At approximately midnight a man came to the victim's door and took the gold and jewellery. The estimated value of the items is in the tens of thousands of pounds.

Similar incidents have been reported throughout the county and it has been known that suspects request cash is posted or for residents to purchase high value goods, and to then meet the people purporting to be officers to hand over the goods.

Last week a man pretending to be a police officer defrauded a victim out of €11,000, which is about £9,700.

Investigating officer, Detective Inspector Chris Burgess of Norwich CID, urged for residents to be vigilant to this scam.

'We're urging members of the public, particularly the elderly who are primarily being targeted, to be vigilant to cold calls made on the telephone,' he said. 'Genuine police officers or staff would never approach residents and ask for cash withdrawals to be made or for people to purchase items on their behalf.

'I would ask people with vulnerable relatives, friends or neighbours to make sure they are aware of this type of scam.'

Officers have issued this advice

• Never give out personal information about your bank account to anybody over the phone.

• If someone calls claiming to be a police officer, ask for their identification number and police force. Hang up and call 101 using a different phone. If you can't use a different phone, wait at least five minutes before calling back. A genuine police officer will not mind waiting while you check.

• Police and banks will never ask you to give out personal details such as account numbers or PIN numbers.

• If you have given out information which could compromise your bank account security in any way, call your bank to cancel your cards as soon as possible.

• Never hand over money to someone at the door to be sent off elsewhere.

Anyone with concerns about such calls should contact Norfolk Constabulary on the non-emergency number 101 or 999 if a crime is in progress. Alternatively, contact Action Fraud on 0300 123 2040