Members of the public have been urged not to approach a man who has been reported missing .
John Middleton was last seen in the Victoria Road area of Aberdeen at around 4.30pm on Friday.
The 21-year-old is described as being white, 5ft 10in, with short dark brown hair, green eyes and speaking with a Scottish accent.
Police Scotland have asked people not to approach Mr Middleton but said "considerable and extensive efforts" are being put into tracing him.
