Men armed with crowbars forced their way into a closed Wigan shop and stole cash after threatening staff.
At about 5.05am on Saturday 15 December 2012, the manager at Martin's Newsagents at Holmes House Avenue in Winstanley opened the shutters to check whether the newspaper delivery had arrived.
She was then confronted by three men armed with crowbars, who forced her back inside.
Two of the offenders used an off-white bedsheet or duvet cover to help themselves to cigarettes, while the third man made demands of the manager for cash.
Another member of staff was also threatened during the robbery.
The offenders left with the cigarettes and money and the victim recalls one of the offenders saying "getting the vehicle now."
They are described as being white men in dark hooded tops.
Detective Constable Andrew Partington said: "The victims were left so traumatised that the descriptions they have given of the offenders are quite sketchy. Thankfully, however, they were uninjured.
"I am interested in hearing from anyone who recalls any suspicious behaviour around the shop at the time and the comment from one of the offenders suggests that they were getting away in a vehicle.
"I would appeal for any witnesses, or anyone who has information which can help us, to get in touch."
Anyone with information is asked to call police on 0161 856 5307 or call the independent charity Crimestoppers anonymously on 0800 555 111.