The bodies of the three people who were found at a Kinohaku property on Friday night were removed from the scene late yesterday afternoon.
Post mortem examinations are being carried in Auckland today.
Investigators working on the investigation, called Operation Artic, expect that these examinations, along with further detailed forensic tests, will provide further information about the cause and time of death.
This is expected to take some time and may not be finally determined for several weeks at least.
Specialist Police staff and ESR scientists will continue to examine the scene throughout the day and night, as the enquiry attempts to reconstruct the events that took place in the house.
This event has been tragic for the families and Police are working closely with the families and the community to support them through this difficult time.
The investigation team continue to seek information on the movement of the Holden Vectra to piece together to movements of Ross Bremner over the last week.
Police encourage anyone with information, even if it seems minor, to contact the Operation Artic team on 07 8586200