FOUR men have been arrested on suspicion of murder after a Liverpool city centre attack in the early hours of September 2nd 2012. Officers were called to Colquitt Street around 2.45am following reports of an assault. There they found 33-year-old Stuart Smith, from London, who was taken to hospital where he died a short time later. A Home Office post mortem is underway to establish the cause of death. Four men, aged 39, 39, 33 and 27, all from the London area, have been arrested on suspicion of murder and are being questioned by detectives. Officers are keen to talk to anyone who was in the area at the time and may have witnessed the incident. They are particularly keen to trace a man who may have captured part of the assault on his camera phone. Anyone with information is asked to call detectives on 0151 777 4065 or call Crimestoppers, anonymously, on 0800 555 111.