This shocking video shows the moment two female shop workers had a gun pressed to their heads by armed robbers.
Two men dressed in black clothing and balaclavas forced their way into One Stop, in Charlotte Street, Ilkeston.
They threatened two female members of staff and forced one to remove a large amount of cash from within the store.
The offenders then tied up the two women and left through a rear door, which leads onto Grass Street, off Charlotte Street.
The armed robbery took place at about 5.30am in the early hours of September 11.
Detective Inspector Donna Sisson, from Ilkeston CID, said: "The two women at the shop were getting ready to open up for the day when they were confronted by these two robbers.
"The robbery itself happened fairly quickly but it has had a much longer-term impact on the two members of staff, who were left terrified after the ordeal.
"It will take some time for them to come to terms with it, and it is vital that we track down the two men responsible and bring them to justice.
"We hope that by showing this footage, someone might recognise the walk or the mannerisms of the offenders, and we want to hear from anyone with information, no matter how insignificant they think it is."
Anyone with information on the robbery should call Derbyshire police on 101, quoting crime reference 38337/14.
