The victim was with workmates when he was assaulted by the two men – who are believed to have used a bladed weapon – and died at the scene.
Detective Inspector Peter Sharp said: “A young man has lost his life and its imperative we find whoever is responsible.
“All information at this early stage is crucial as it helps us begin to piece together what has happened. At this stage we do not know why this attack has taken place.
Daniel was with work colleagues in Stravanan Street when he was set upon by two men at 10.50am on Friday.