Neighbours made attempts to enter a Dunedin home engulfed in flames in hope of saving the occupant, but were beaten back by the intensity of the blaze.
A body has been recovered from the scorched remnants of the Nutsford St home in the suburb of Brockville, after fire tore through the flat about midnight on Friday.
Senior Sergeant Brian Benn said a fire investigator and CIB staff were at the scene on Saturday, but it was too early to comment on how the blaze started.
A body was found at the flat, but police had not yet completed formal identification and would not release any further details until this had taken place.
A Fire and Emergency New Zealand spokesman said firefighters were called to the blaze at 12.02am and the first unit arrived about six minutes later to find the home well alight.
The Housing New Zealand flat was one of four in the multiplex.
There was smoke damage to some of the other flats, neighbours said. It could be seen where the fire had burned through the roof cavity into an adjoining home.