A man was knocked unconscious as he was walking home following a night out in Corby.
The victim was punched in the face and then fell to the floor after he was confronted in Sower Leys Road, some time between 1am and 2am last Sunday (November 27)
The only description of the attacker made available by police is that he was white.
Witnesses or anyone with information about the assault is asked to contact Northamptonshire Police on 101 or Crimestoppers, anonymously, on 0800 555111. The incident number is 16000394272