Police are appealing for witnesses after a man was punched in the face at NBs in Bridge Street, Northampton town centre.
The incident happened between 2am and 3am on Saturday, 19 March, when the victim was assaulted by a stranger, causing a broken nose which required treatment at Northampton General Hospital.
The offender is described as a white man with a slim build with short, blonde hair. He was wearing a long-sleeved dark coloured top with black jeans and shoes.
Officers have releasing a CCTV image of a man they would like to speak to in connection with the attack.
Anyone who recognises the man in the attached image - or who witnessed the incident - is asked to contact police.
Witnesses or anyone with information can contact police on 101 or Crimestoppers anonymously on 0800 555 111.