Police have released CCTV of a man they are seeking in connection with a "vicious" attack in north London that left a young man in an induced coma for weeks.
Met Police officers were called to Bulstrode Street, Marylebone, at around 5.20am on Sunday morning following reports of a man found unconscious.
The 23-year-old victim, a student from Spain, was on his way home after celebrating the end of a successful internship.
He was approached from behind by a stranger and struck with a "devastating" punch in an unprovoked assault, Scotland Yard said.
The victim was kept in hospital in an induced coma for weeks after suffering head injuries, police said in a statement.
CCTV recovered by officers showed the suspect search the victim’s pockets while he lay unconscious, it added.
The suspect stole a phone, wallet and cash before leaving the unconscious victim lying in theroad.
The suspect later entered a nearby hotel and tried to order a taxi to take him from the area.
There have been no arrests and enquiries continue.
The victim has now returned home to Spain.
Detective Karl Lewis, from Westminster Borough, said: "This was a completely unprovoked assault on a young man walking home after a night out. The victim has only just managed to make a full recovery from his physical injuries, however this attack has had a large psychological impact on him.
"The man who committed this crime is a violent thug and we are desperate to bring him to justice. I would urge anyone who recognises the man in the CCTV still to do the right thing and call police."
Any witnesses or anyone with any information is asked to call police on 101 or contact via Twitter @MetCC. Quote CAD 1817/19Aug 2018.
To give information anonymously contact Crimestoppers on 0800 555 111 or online at crimestoppers-uk.org.