Police have released images of a man they want to question over a violent attack in Edinburgh during the early hours of New Year's Day.

A 29-year-old man was taken to hospital with a serious injury after being struck on the face at around 5.15am in South Bridge, near the junction with Niddry Street.

Police believe the man pictured may be able to assist with the investigation.

Detective constable Darren McDonald said: "The victim sustained a painful injury following an unprovoked attack, and we believe the man pictured may have information which could be of assistance to our investigation.

"We're now appealing for the public's help as part of our enquiries and would urge anyone who recognises him, or who may have been in the area at this time and has information of any relevance, to come forward."