Police are appealing for witnesses following an attempted robbery in Old Road, Clacton, shortly before 9am on Saturday, July 8.
A man has entered a post office store armed with a knife.
A man working in the shop has had the knife held to his throat before managing to take it from the suspect.
The suspect then fled on foot towards Magdelen Road.
He is described as being in his 40s, around 6ft tall and was wearing a black hooded top and black framed glasses.
The victim suffered minor injuries.
Detective Sergeant Tim Coyles of Essex Police said, “We are currently treating this as an isolated incident but we would like to remind shop owners to be vigilant.
If you saw a man matching the above description going to or from the shop or have any information please contact us at Clacton CID on 101.”