A masked man brandishing what looked like a hand gun stormed into a Rotherham post office and demanded cash this afternoon.
The armed robber burst into the Wingfield Post Office, just off Ochre Dike Walk, at about 2.25pm and began making demands to staff.
But the suspect left empty-handed and is thought to have fled the area in a white van.
Police are appealing for anyone who may have witnessed the incident, or seen anyone acting suspiciously at that time, to come forward.
Contact officers at South Yorkshire Police on 101 quoting incident number 554 of March 26.
Alternatively, you can contact independent registered charity Crimestoppers anonymously on 0800 555 111, or online at www.crimestoppers-uk.org.