By Joe Smith A murder investigation has been launched following the death of a 64-year-old man, police have said. A 38-year-old has been arrested on suspicion of murder following the incident in Butetown, Cardiff. South Wales Police said officers were called to a property in Belmont Walk shortly after 9am on Sunday. Detective Chief Inspector Matt Davies, who is leading the investigation, said: “Clearly, this incident will cause shock to the close-knit community of Butetown.” “I want to assure the public that an early arrest has been made and we are not looking for anyone else in connection wit…