West Yorkshire Police are appealing for witnesses after a pair of pensioners were the victims of an armed robbery.
The incident happened on Lumley Road, Dewsbury at 4.30pm on Tuesday 18 December when the occupants answered a knock on the door.
On hearing carol singing the male occupant opened the door, to be confronted by a male with a knife.
In the confrontation, the male occupant fell to the floor, suffering minor injuries.
The offenders left with an amount of cash.
Detective Inspector Stephanie Fox of Kirklees CID, said: “This was a particularly nasty robbery against two elderly people. In the end the male only made off with a small amount of money.
“The victims were very frightened by the ordeal and I would appeal to any witnesses to the incident or who saw anyone acting suspiciously in the area at around 4.30pm to come forward.
“We would always urge people to be extra vigilant when answering the door to unexpected callers – for example by having a chain on the door and using it.