A man was punched in the face by three men in Wellingborough after being approached for a cigarette.
The victim, 18, was in Castle Fields Park, near Castle Street and Irthlingborough Road, at about 2.40pm on Monday, November 2, when the incident took place.
He was approached by a woman who asked him for a cigarette, but when he offered her one she grabbed the pack from him and walked away.
At this point three men then approached the victim and pulled him to the ground, punching him in the face and causing a small cut.
His bag was searched but nothing else was taken, although his glasses were damaged.
One of the offenders was white, in his late teens, thin and about 6ft.
He was wearing black tracksuit bottoms and a light blue tracksuit coat, black Snapback cap and was carrying a bag.
The woman who asked for a cigarette was also in her late teens, white, with blonde, shoulder-length hair, thin and about 5ft 2in.
She was wearing a white top and black jeans.
Police would like to speak to anyone who may have witnessed the incident or who may have any information regarding it.
Anyone with information should contact police on 101 or Crimestoppers anonymously on 0800 555111.