Police have released CCTV images of a man they want to trace in connection with a serious assault on a teenager in Glasgow city centre.
An 18-year-old man was attacked in Sauchiehall Street at 03:10 on 13 January.
Detective believe the man pictured could have information and have urged him to contact them.
The teenager was treated at Glasgow Royal Infirmary for serious injuries following the assault.
The man they want to trace is described as white, aged between 20-30 years old, about 5ft 10in tall and of medium build.
At the time, he was wearing dark skinny jeans with rips, a blue jacket and blue top with a light-coloured pattern.
Anyone with any information about the incident or who recognises the man is urged to contact police.