A motorist was punched in the face three times by another driver as he sat at a set of traffic lights in Northampton.
The man was driving along Horsemarket at about 6am on Thursday, January 8, when he accidentally cut up another car, which looked like a silver Vauxhall Zafira.
The driver of the Zafira then shouted at the man, who drove through the red light to get away.
The Zafira driver then followed the man to the traffic lights in Grafton Street, opened his car door and punched him in the face three times.
The attacker was a white man in his early 20s. He was of medium build.
Witnesses, or anyone with any information about this incident, can call Northamptonshire Police on 101 or Crimestoppers on 0800 555111.