South Yorkshire Police say that two men walked into the Chesterfield Road shop in the Meersbrook area of the city and assaulted the shopkeeper with what is believed to be a baseball bat before making off with a quantity of cash and alcohol running towards Cliffefield Road.
The men are both described as white and were reportedly wearing dark clothing. One is thought to be about 5ft 6 to 5ft 8ins tall and was carrying a black sports holdall while the other is described as about 5ft 8 to 5ft 10ins tall.
The incident happened at around 10am on Friday January 6 and anyone with information is asked to call 101 or email [email protected] quoting incident number 271 of 6 January 2017.
You can also pass information to Crimestoppers on 0800 555111.