The duty manager of the nearby Coyote Bar and Gaming Lounge told the Herald the bar was closed when the assault happened but police came to speak to staff and look for evidence this morning.
Two people were arrested for assault. However no charges were laid and they were later released.
Police are continuing with their homicide investigation.
The family of the man who died have been notified and are receiving support from Police and Victim Support.
Anyone with information about the incident or anyone who was in the area at the time, is asked to contact the Operation Cyclone team on 09 295 0200.