Police are appealing for information after a burglary at a property on Cromwell Street in Lincoln, off Monks Road.
On entering, three men threatened a man and a woman living at the house and left with a small amount of money and a set of keys.
The incident took place at around 11.45pm on January 20.
One of the men is described as white and of slim build. He is also said to have a pronounced nose and chin and facial hair.
All three men were wearing dark clothes.
Anyone with any information can call DS Jen Waddington at Lincolnshire Police on 101, quoting incident number 433 of January 20,2014.