A woman was hit in the face while walking her dog in Edlington Woods.
Police were called following a report of the assault at around 6.30pm on Monday.
The 35-year-old woman was walking her dog when she was approached by a man who attempted to attract the dog’s attention.
The woman asked him not to do this and the man has hit her in the face before running away.
He is described as white, around 25-years-old and wearing a black hooded jumper, blue jeans and dark shoes.
If you have information about the assault is asked to call South Yorkshire Police on 101 quoting incident number 963 of 1 June 2015.
Alternatively, you can call Crimestoppers anonymously on 0800 555 111.