A man was left with a cut lip and broken tooth after being attacked by a group of teenagers in Sheffield.
The 50-year-old was walking along Longley Avenue West, Shirecliffe, when he was confronted by a group of youths outside a takeaway close to the junction of Shirecliffe Road.
Police believe that a teenager from the group blocked the path of the man before punching him.
The victim lost his balance and fell to the ground.
A South Yorkshire Police spokeswoman said: “The man sustained a cut to his lower lip and a broken tooth as a result of the incident.
“Police are appealing for anyone with information to come forward.
“Officers would also like to trace a woman who was nearby and assisted the man as he tried to contact the ambulance service.”
The teenager police want to trace was male, aged around 15 or 16 years old and around 5ft 8ins tall.
He was of a stocky build with short, dark hair and was riding a bike.
Anyone with information should call South Yorkshire Police on 101 quoting incident number 1,182 of November 30 or Crimestoppers on 0800 555111.