Police say the cause of the death of a woman found in a house at Tuakau, south of Auckland, is still not known.
However, a post mortem shows it was not caused by any inflicted injuries.
Susan Jehoda, 38, was found dead by friends on Saturday afternoon.
The post mortem was unable to immediately establish a cause of death.
However, police anticipate toxicology results will assist in determining the cause of death.
The case has been referred to the coroner.