A woman jogger was punched and pushed by a man who stole her backpack.
The 33-year-old was stopped by a dog walker who asked her the time before demanding her purse on a path off Field Lane, Killamarsh,
Police said the woman handed over some money but the robber then punched and pushed her before stealing the pink Nike backpack she was carrying.
The incident occurred between 1.30pm and 2.20pm on Monday, June 23.
Detectives investigating the robbery said the victim suffered bruising to her face and collarbone.
She described the robber as aged in his 40s, around 6ft tall, of a skinny build and with long, unkempt, dark hair.
He was wearing a black T-shirt, three-quarter length trousers and boots.
Witnesses to the incident or anyone with information on the identity of the robber should call Derbyshire Police on 101 or Crimestoppers on 0800 555 111.