42 year old Leon Woods, 39 year old Cleveland McEntee and 34 year old Tron McEntee were all arrested on Wednesday.
Police were called to the stabbing of a 39 year old man in Uxbridge Road on Saturday just before 8pm.
He died at the scene.
A 30-year-old woman also arrested on suspicion of murder on Wednesday has been bailed until a date in mid-June.
