A man was punched in the face in Kettering after being chased through the town following an earlier altercation.
The 34-year-old victim was chased from Silver Street to Dalkeith Place in the early hours of Sunday, January 3.
The offender caught up with the victim at the back of the Abacus pub, at which point he punched him in the face before making off.
The victim received cuts and bruising to his face.
The offender was a black man, of medium build and in his mid 20s.
Officers would like to speak to anyone who may have witnessed any part of the incident, including the assault outside the Abacus pub which was closed at the time.
Witnesses or anyone with information should contact police on 101 or Crimestoppers anonymously on 0800 555111.