Detectives investigating a robbery at a house in Shirebrook in January have re-appealed for witnesses or information.
At around 8.25pm on Saturday, January 25, two men walked into a house in Field Drive and an argument broke out between them and the two men and one woman inside.
One of the burglars fired a shot into the wall and the two men stole cash before driving off in a car. No one was injured.
The man with the gun is described as 5ft 7ins tall and stocky. He wore a black balaclava and dark clothing.
His accomplice was 5ft 10ins tall and wore a green military style jacket, dark trousers and a black balaclava. He was holding a knife.
Both men are white.
A small, light-coloured hatchback car was seen in the area that night. It had distinctive writing on the back, similar to graffiti.
Three men aged 32, 34 and 45, who are all from Nottinghamshire, have been arrested, questioned and released on police bail while the police investigation continues.
Anyone with information, who has seen the car or who was in the area of the night of the offence should call police on 101 or call Crimestoppers anonymously on 0800 555 111.