North Yorkshire Police has released the image of a suspect they would like to trace following a serious unprovoked assault in the city during the early hours of Sunday morning.
Ashley Paul Watson, 18, is suspected of being responsible for the incident at a property on Lead Lane, which resulted in a 20-year-old woman receiving serious facial injuries.
Watson is described as white, around 5ft 10in tall with a medium build and short dark brown hair.
His current whereabouts are unknown at this time.
Detective Inspector Karen Warner, of North Yorkshire Police, said:
Ashley, if you see or hear this appeal I strongly urge you to make contact with the police. You are aware that we need to speak to you and you maybe placing others at risk of prosecution by not cooperating.
I am also asking anyone who knows where Ashley is to contact the police straight away, using the numbers provided. It is important that anyone assisting or shielding Ashley is aware that they themselves maybe committing an offence.
Members of the public are urged not to approach Watson, but to contact the police straight away if they see him.
Anyone who can help to locate Ashley Watson is asked to contact North Yorkshire Police on 101 immediately, select option 1, and pass the information to the Force Control Room.
Or call Crimestoppers anonymously on 0800 555 111.