Police in Glasgow are searching for a Good Samaritan who called an ambulance for an assault victim left lying unconscious in the street.
The 42-year-old man was found in Cadogan Street near the junction with West Campbell Street at about 9.15pm on Sunday.
Police said the man had been involved in an altercation with another man in Cadogan Street a short time earlier, who then attacked him and left him unconscious.
A member of the public found him and called an ambulance, but then left.
The victim was taken to Glasgow Royal Infirmary for treatment to facial injuries.
Detective Constable Nicol McPherson said: “The man who called the ambulance left the scene before it arrived and took the injured man to hospital, so we are keen to speak to him about what he may have seen or knows about what happened.
“Officers have been checking CCTV in the area and we know that Cadogan Street at West Campbell Street can be quite busy around that time of night.
“There is a local soup kitchen not far from where the attack took place, so it is possible that someone there saw the attack and could help our investigation.”
The suspect is described as white, tall, thin and with dark hair and stubble. He was wearing a grey jumper.
Anyone with information is asked to call police on 101 or Crimestoppers on 0800 555 111.