Police are appealing for witnesses after four men robbed a Lincolnshire Co-operative store with what is believed to be a gun.
The incident took place at 8.26pm on Friday, February 8, at the store on Queen Elizabeth Road, in Lincoln's Ermine estate.
Two of the men went inside the store and approached the check out, while another two stood near to the shop door.
One of the men then produced a plastic bag at the checkout which appeared to contain a gun.
The man demanded cash from the checkout clerk. Money was handed over and the four men left the store.
No one was injured but staff were left shaken after the robbery.
The men all wore casual clothing with tracksuit style trousers, trainers, hooded tops with hoods and scarves obscuring their faces.
Anyone with any information is asked to contact Lincoln CID via the non-emergency telephone number, 101. Alternatively, they can call CrimeStoppers anonymously on 0800 555111.
Police were unable to say whether or not the robbery was connected to the four knifepoint robberies which took place between February 7 and 10 at the Corner Shop in West Parade, Betfred bookies in Carholme Road, Select and Save in Baggholme Road and The Grapevine in Burton Road.
On each of these four robberies, the men hid their faces with scarves and hoods.