Two men are being questioned in connection with the death of an Irishman in Manchester.
Dylan Crawford, 20, was found unconscious on Spear Street in the city centre at around 1.40am on Wednesday.
He was taken to Manchester Royal Infirmary, but later died.
Mr Crawford was from Killygordon in Co Donegal.
Police said the results of a post-mortem examination were inconclusive and investigations are continuing.
Two men were later arrested on suspicion of theft and supplying drugs.
Police have also issued a CCTV image of a man they want to speak to in connection with the death.
Detective Inspector Rebecca Boyce said: "We are still working to determine the exact circumstances surrounding Dylan’s death".
Mr Crawford's family paid tribute to him describing him as the "heart of our family".
In a statement they said he loved to travel and "would give the world to anyone".