German national Thomas Heinrich died after a fight broke out at the Herberton apartments on Saint Anthony's Road in the Rialto area in the early hours of Saturday morning.
Another man was injured in the incident.
A woman in her 40's and a teenage boy have been released without charge after being questioned in relation to the investigation, while a second teenage boy remains in Garda custody.
Advertisement
Rebecca Moynihan is a Labour Councillor in the area - she says the community needs more Garda resources: