Detectives investigating a robbery at a hotel in Long Eaton have released CCTV footage of the incident.
Three men broke into the Best Western hotel in Bostocks Lane and forced a member of staff to hand over cash from a safe.
The men, who were all wearing dark clothing and had their faces covered, then fled the scene.
Footage of the men breaking in through the main entrance and going into the office area has now been released.
It is hoped that members of the public may recognise the clothing of the offenders, or might remember suspicious activity at the time of the offence.
Anyone with information that could help the investigation should call Derbyshire police on 101, quoting crime reference 48446/14.
You can also call Crimestoppers, anonymously, on 0800 555 111.
The robbery took place at about 2am on Saturday, November 15.