Police are appealing to visitors to the city centre who may have seen a naked man who was later found dead.
At about 1.15pm on Monday 19 August 2013, police were called to a construction site on Smithfields, off Goadsby Street, to a report that a body had been found.
The man believed to be in his twenties was found at the bottom of a lift shaft and an investigation into the circumstances leading up to his death has begun.
A post mortem examination will take place later this week.
The death is not being treated as suspicious.
Police had earlier been called to a report of a naked man running through the streets of the Northern Quarter at about 10.30pm on Friday, 16 August 2013.
Police received a subsequent call about a concern for welfare relating to the same man and officers went to the scene.
They searched for the man but couldn't find him. It is believed he had climbed over a fence and entered the construction site.
At no point did officers actually see the man, however, due to the death occurring after police contact Friday night’s response has been mandatorily referred to the Independent Police Complaints Commission. Detective Inspector Brian Morley said: