Police are investigating an aggravated burglary at a house in Fordham in which a pensioner and a woman were threatened with a knife by four men who forced their way into their home.
A man called at the house in Market Street around 6pm on Tuesday and claimed to be from the water board.
He then pushed the victim, a man in his 70s, into the house and was followed by three men wearing black bandanas, woolly hats and gloves.
They threatened the victim, and a woman in her 40s, who was also at the house, with a knife from the kitchen, demanding cash and the jewellery they were wearing.
They then pushed the couple to the floor before ransacking the house and then making off with jewellery, including necklaces and rings, and cash.
The men are all described as white and wearing dark clothing.
Detective Sergeant John Yore said: “This is a particularly unpleasant incident, which has left the victims feeling very vulnerable. We have the right support in place which will help them cope and recover from this awful experience.
“We are prioritising the investigation and are committed to catching those responsible as soon as possible.
“I urge anyone with information to come forward. I also urge residents to be vigilant with their own security and that of their neighbours’, particularly if they are vulnerable, and request that any suspicious activity is reported to the police”.
Anyone with information should contact police on 101 or Crimestoppers, anonymously, on 0800 555 111.