An elderly couple from Letchworth have been left traumatised after being sprayed in the face with an unknown substance by balaclava-clad burglars.

The Comet: Earrings, bangles and a ring were stolen from a woman in her 70s during an aggravated burglary in Letchworth.Earrings, bangles and a ring were stolen from a woman in her 70s during an aggravated burglary in Letchworth. (Image: Archant)

Police are appealing for information today after the attack in Jackmans Place which took place between 8pm and 8.15pm on Saturday night and left a couple in their 70s requiring hospital treatment.

On the night three men wearing balaclavas knocked on the front door of the house, confronted the man who opened the door and forced their way in past him.

They then sprayed the man in the face, assaulted him – leaving him with injuries to his eye – and took his watch.

The men then sprayed his wife in the face before taking off her earrings, bangles and ring.

One of the men – who is believed to have spoken in Punjabi – then searched an upstairs bedroom before all three men left via the front door.

Investigating officer Det Con Steve Cook said: “This was a nasty and unprovoked attack on a vulnerable, elderly couple who have, quite understandably, been left traumatised by their terrifying ordeal.

“Both victims required hospital treatment and the man is still suffering with the injuries caused to his eyes.

“We are doing all we can to catch those responsible and I would appeal to anyone with information about what happened to contact me immediately.

“Did you see three men acting suspiciously in the area around the time stated?

“Have you come across any jewellery matching the items pictured? Any information, no matter how seemingly insignificant, could prove vital to the investigation.”

Anyone with information should call the police non-emergency number 101 or Crimestoppers anonymously on 0800 555 111.