"As part of our inquiries, post-mortem examinations will be carried out on the two people as well as a scene examination at the property."
Police could not comment on specifics but further updates would be provided later, Sutton said.
Six detectives were visible this morning at the house on Manatu Lane, a small residential cul-de-sac.
Police tape was strung across the entrance and an officer was standing guard.
"I heard them swearing and crying and yelling, then sirens and the police came not long after," said a woman who lived on a neighbouring street.
She had heard similar incidents from the same property in February and around Christmas time.
"It's a common thing there but it's not normal - we've never had that in our community before and I've been here 13-14 years," said the woman, who lives in a state house.
She understood most houses in the new development on Manatu Lane also belonged to Kāinga Ora (formerly Housing NZ.)
A real estate agent confirmed to the Herald the brand-new house was recently sold to Kāinga Ora , which owns most of the homes on the cul-de-sac.