Police are appealing for witnesses following an assault in Alfreton.
The offence happened around 12.15am, on Sunday, July 27, when a man was walking home along Nottingham Road when he was approached on the street by a man and assaulted.
The victim was punched in the face and fell to the floor where he was knocked unconscious.
He was then helped up by an unknown person shortly after the attack.
The assault resulted in the victim receiving surgery for a broken jaw at Queens Medical Centre.
The offender was said to be wearing dark-coloured clothing.
Officers are keen to speak to the person who helped the victim around the time of the incident to aid their investigation.
Witnesses or anyone with information is asked to contact Sarah Fraser at Ripley CID on 101 or Crimestoppers anonymously on 0800 555 111.