The victims of the yesterday's shooting in the Auckland CBD were two men in their 40s, police have confirmed.
The men worked at the construction site alongside the shooter, Matu Tangi Matua Reid, who was also killed.
Reid, 24, walked on to the building in lower Queen Street on Thursday morning and opened fire with a pump action shotgun.
Police said post mortems were expected to be completed in the coming days.
A scene examination was continuing at the site, and the cordon around the immediate vicinity was expected to remain in place in the coming days, as police worked through the various building areas.
"CBD residents and workers can expect to see a continued police presence in the area as this work is undertaken," Relieving Auckland District Commander Acting Superintendent Sunny Patel said.
One police officer remains in hospital in a stable condition, and one officer is recovering at home from their injuries, he said.
Support is in place for the officers and their families.
Three other people injured in the incident remain in hospital with non-life threatening injuries, and two people have been discharged from hospital.
A spokesperson for the Chinese Embassy said at least one Chinese citizen was injured in the incident.
Police were not aware at this stage of any further people presenting at hospital with injuries, Patel said.
"The events of yesterday morning were incredibly traumatic for all involved and we know New Zealanders have many questions about what occurred."
"I can assure you that a large investigation team is working to provide answers to those questions, particularly for the families of the two men who lost their lives and the other workers caught up in this tragedy."
Worker wary of returning to building site
Tepapakahurangi Toatahi was working on level 2 of the building at 1 Queen Street when the shooting happened.
He had been given a few days off work but wouldn't feel safe returning to the site in future, he said.
He was considering moving back to his home town in Northland, feeling Auckland was unsafe.
Christina Elena was in a nearby office building on Thursday morning and said some colleagues were still shaken.
She said colleagues heard the shots but initially thought they were construction noises.
"It was pretty jarring - we were all sent home immediately and obviously told not to come back. And actually for a while we weren't even allowed to leave, we were told to stay away from the windows. It was pretty scary for quite a while."
Elena said staff were told they could work from home on Friday if they preferred to stay out of the city.