An armed robber threatened staff at a Dearne convenience store with a gun before making off with the contents of the till.
Detectives are investigating the crime on Lorne Road, Thurnscoe, Barnsley, at 2pm on Friday.
A police spokesman said: “A man entered a conveience store in Lorne Road and threatened staff with a firearm.
“The offender left the store with the contents of the cash register.”
The robber was described as white, aged in his 20s and was wearing a distinctive beige or green coloured, oversized camouflage coat.
Enquiries are ongoing. Anyone with information should contact South Yorkshire Police on 101 quoting incident 566 of Friday 1 August.