Two men were knocked unconscious after an assault in a Northampton town centre pub.
Two men in their 40s were seriously injured in the assaults, which involved one of them being hit with a bottle inside the Edge of Town pub in Northampton.
Both assaults are believed to have been unprovoked. One of the victims is still in hospital in a serious condition.
The offender is described as a white man, between 5ft 6ins and 5ft 8ins and of medium build with short, ginger hair. He wore a white t-shirt and jeans.
Witnesses or anyone with information about this offence, which took place on Sunday, July 10, between 7.55pm and 8.15pm, is asked to ring the police on 101 or Crimestoppers anonymously on 0800 111 555.