Detectives are seeking a man "in his early 20s" they want to speak to in connection with a stabbing in Northampton yesterday.
The victim had to be airlifted to the University Hospital Coventry for emergency treatment, but his injuries are not life-threatening.
The offender, who is believed to have run off in the direction of Bunting Road, was described as black, aged in his early 20s with a slim build. He had long black hair, possibly either in dreadlocks or matted, and he was wearing a dark-coloured hoody and dark jogging bottoms
Anyone with information should call Northamptonshire Police on 101 or Crimestoppers, in confidence, on 0800 555111.