At about 11.45am today (Tuesday), a security van outside the Royal Bank of Scotland, on High Street, was targeted by an unconfirmed number of offenders carrying machetes.
They stole a large amount of cash from the vehicle and fled the scene in a white transit van.
The exact amount of money taken has yet to be confirmed and South Yorkshire Police have since recovered a white transit van, believed to be the one used during the robbery, on King Street, Swallownest.
No-one was hurt during the incident.
Officers are now asking members of the public to contact the police immediately if they witnessed the robbery, have information about what happened, or saw the white transit van in the Swallownest area, or on King Street, following the raid.
Contact South Yorkshire Police on 0114 2202020 and quote reference: 373 of 27 September. Alternatively, you can call Crimestoppers anonymously on: 0800 555 111.