"At this stage we are unable to release the woman's name.
"The man located injured remains in a critical condition in Middlemore Hospital."
Bolton said he "would like to reassure the Pukekohe community that while we have launched a homicide inquiry into this matter, we are not currently seeking anyone else in relation to the woman's death".
"Our scene examination remains ongoing at the house today," he said.
"While we appreciate there may be further questions about our presence at the address, we are unable to comment further as this forms part of our investigation.
"Police would still like to hear from anyone who has information that may assist the inquiry.
"They can contact Counties Manukau Crime Squad on (09) 261 1321."