Police said they were not seeking anyone else in relation to the matter.
The Waimana Rd house was cordoned off last night and a scene guard was in place.
A mobile police station truck arrived at the house about 7.30pm yesterday.
Officers appeared to be working inside the large truck and inside the house.
Neighbours said they had not been told what happened but believed a man and woman lived at the address.
The man was friendly, said one neighbour who wished not to be named.
Another neighbour said the man's rubbish bins had been outside his gate for "a long time".
The house is opposite a number of industrial businesses, and workers were seen speaking with police officers this afternoon.