Two men armed with a knife and a sledgehammer raided a convenience store in Wigan.
Police were called to reports of an armed robbery shortly after 10pm on Sunday at Spar in Whelley.
Two masked men with a knife and a sledgehammer entered the shop and ordered the staff to stand behind the tills.
They stole cash from the till and a large quantity of cigarettes.
The robbers then forced the staff into an office at the back of the shop and demanded more money.
The duo fled in the direction of Gold’s Ice Cream Parlour, on the corner of Moore Street East and Whelley.
Nobody was injured during the robbery.
One of the offenders was described as approximately 6ft 1ins tall and of slim build, while the second man was described as approximately 5ft 8ins tall.
They both wore gloves, balaclavas and dark clothing.
Det Con Andrew Hill said: “It is completely horrific that people that were just in their place of work have been subjected to this awful attack.
“Whilst no-one was injured, the actions of these men have left the employees extremely shaken and I would appeal to anyone with any information that could help our investigation to please get in touch.
“If you saw anything suspicious in the area at the time of this robbery, no matter how small or insignificant it may seem, I would urge you to contact police so that we can find the men responsible.”
Anyone with information is asked to call police on 101, quoting incident 1964 of January 7, or the independent charity Crimestoppers, anonymously, on 0800 555 111.