A gang of men wearing forensic suits robbed a Co-op store in Bolton.
The robbery happened at the shop on Newbrook Road in Over Hulton, shortly before 10pm on Thursday 27 September 2012.
Between four and six men, who were wearing white paper forensic-style suits and balaclavas, forced their way into the shop. They were also carrying hammers.
One of the men hit a staff member in the head with a hammer. The group then went behind the counter and stole money from the till.
The men then ran out of the shop and drove off in a silver car.
Shortly after the robbery had taken place, a silver Mazda was found partially burnt out on Masefield Drive in Farnworth. Police believe this car may have been involved in the crime.
The male shop assistant suffered minor injuries and was taken to hospital for treatment.
Detective Inspector Chris Walker from Bolton CID said: “There were a number of staff in the shop at the time of this robbery, who have understandably been left extremely shaken after a group of men in forensic suits came into the store and hit one of their colleagues with a hammer. And all this was for the sake of a small amount of cash.
“Thankfully, the victim was not more seriously injured, but I am appealing for the public’s help so we can catch those responsible and take these dangerous individuals off our streets.
“Did you see these men in a silver car before the robbery took place, or did you see them afterwards as they fled the scene? We are also asking for anyone who saw a silver Mazda being driven towards or being set alight on Masefield Drive to get in touch as your information may be vital to our investigation.”
Anyone with information is asked to call police at Bolton CID on 0161 856 5740.