Police and ambulance staff pronounced him dead at the scene in the early hours of December 30.
The man was later named as Te Reo Wickliffe-Heta, also 24 years old.
Detective Senior Sergeant Terri Wilson said: “We know this will have been a shock to the community. However, we would like to reassure them this was an isolated incident.”
Police appeal for help: ‘Even the smallest detail’
Police have asked anyone who might have any information to come forward.
“We are continuing to make inquiries, but also want to encourage anyone with information to get in contact with us as even the smallest detail could assist our investigation,” Wilson said.
Authorities have also made sure proper support is in place for those closest to the victim, police said.
Can you help? Anyone with information is urged to call police on 105 or CrimeStoppers Anonymous on 0800 555 111