Armed robbers wearing Halloween masks threatened terrified shop staff with a gun and made off with £500 - the third armed robbery in two days across the city.
The incident on Lees Hall Avenue, Norton Lees, in Sheffield took place at a Co-op store around 7.20pm on Monday night.
Police have said that two men entered the store faces covered as one pointed a gun at staff.
It was reported they the scene in a white coloured car.
Both men were also wearing hooded tops, one in green and one in red, and had the hoods pulled up over their heads.
The man in the green top is described as having a local accent, is of a slim build and 5ft 9ins tall.
Police have issued a wider appeal after the latest armed robbery.
The first robbery was at a Spar store on Stannington Road at around 9.30pm on Sunday, September 27.
Two men entered the store and threatened staff with a knife.
Police have said that one of the men was wearing a mask, similar to one from the film “Scream”, and is described as being of medium build and was wearing a navy The North Face jacket.
The second man was wearing a black jacket with grey fur around the hood. Both men were wearing distinctive red and yellow gloves.
They left the store with around £200 in cash and a quantity of cigarettes.
The second robbery occurred at around 6.45pm at a convenience store on Grimesthorpe Road in Grimesthorpe.
One man entered the store dressed all in black with his face partially covered, and was reported to be in possession of both a knife and a firearm.
He attacked a member of staff by hitting him across the head and then fled the scene with around £50.
The victim was taken to hospital and required stitches for his injury.
Detectives investigating the three armed robberies are urging anyone with information to please come forward.
Detective Inspector Richard Partridge said: “We are investigating each robbery as a separate incident; we are not linking them at this time and there is no suggestion or intelligence to suggest they are connected.
“I would ask anyone who lives in either Stannington, Grimesthorpe or Norton Lees, and believes they may have information, been a witness, or if they were in the surrounding area around the times the crimes were committed, to please contact police.
“I want to reassure businesses in Sheffield that these incidents are being treated as a priority and we are committed to finding those responsible.
“If any of the details sound familiar, no matter how insignificant you think it may be, I would urge you to please make contact with us as your information could prove vital.”
If anyone has any information, contact 101, or Crimestoppers anonymously on 0800 555111, quoting incident number 961 of September 28.