GWENT is being targeted by conmen preying on elderly and vulnerable people, police warn.

At least 20 people were targeted by bogus callers in the past month, but police believe these are just the tip of the iceberg as many are too embarrassed to report thefts or admit how much has been stolen.

In the latest incident, two thieves claiming to be plain-clothes policemen stole cash from a Magor woman's handbag on Wednesday.

And on the same day an elderly woman in Marshfield had £545 stolen by a bogus 'water board' official.

The man, who had an Irish accent, told the woman he was looking for a leak and then asked if she had change for a £20 note. He then distracted her and took the money. Last week the Argus revealed how a Valleys woman had £80 stolen by a bogus water company official.

Gwent Police spokesman PC Wayne Maule said: "Over the last month we have had 20 confirmed bogus officials and we're estimating that's well below the actual number, which is probably double or even triple that amount.

"They use three or four different methods to get access, posing as the water board, the gas board, police officers or gardeners.

"The worst hit area is Newport and Torfaen, though we have had isolated incidents in Caldicot and Caerphilly."

He added: "They are targeting the elderly. Thefts can be of as little as £5 or as much as £700.

"These people are organised, they are professionals and their methods are horrible.

"We want everyone to be aware this is happening and anyone who has information should contact the police on 01633 244999."

Councillor Fred Bacon, who represents the Upper Cwmbran ward on Torfaen council, said he was horrified by the spate of incidents.

He added: "If it was up to me I'd chop these thieves' hands off.

"People are being conned and they have to report it to the police or they'll never get anywhere."

A spokeswoman for Welsh Water said: "All our workers and contractors will always have ID or be able to verify who they are.

"And they would never identify themselves as being from 'the water board' - they are from Welsh Water."

Sergeant Russell Frampton, of Newport police, said: "There is a problem at the moment with people preying on the old and vulnerable.

"Any official caller should have identification and if they don't, or you are not satisfied, don't let them in. If you are concerned, call the police."

*Pictured: Community police officer PC Simon Jenkins calls on Newport resident Eric Smith