Police are trying to find the man responsible for a "totally unprovoked" attack in Edinburgh city centre which left the victim with a head injury.
Detectives are investigating a serious assault on Frederick Street on the night of Friday, November 8.
A 23-year-old man was attacked by someone described as being 6ft tall with a heavy build.
The victim suffered a head injury during the assault, which took place between 11pm and 1am. The attack was reported the following Monday.
Detective constable Iain Wallace, of Police Scotland's Violence Reduction Unit, said: "I am appealing for anyone who was in the area at the time and may have witnessed this incident to come forward.
"This was a totally unprovoked attack on a member of the public."
Anyone with information has been asked to contact police via 101, quoting incident number 1547 of 11 November.
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