Police are "not looking for anyone" in relation to a fire at the Shotover Delta on Tuesday night and say the fire was not suspicious.
Detective Lisa Watt, of Queenstown, said the police were also not looking to lay any charges in relation to the incident, which destroyed a storage shed located near the Queenstown Airport runway, in an area that would be used for construction of the airport's runway end safety area (resa).
The land is also involved in a sewage-disposal scheme by the Queenstown Lakes District Council.
Fire crews spent about an hour bringing the blaze under control after being alerted to the incident at 7pm on Tuesday.
The shed was owned by firewood company Woodstock.
Fire Safety Officer Mike Cahill completed the investigation on Wednesday, but told the Queenstown Times the matter was being dealt with by the police.
He was unable to release details of the cause of the fire.
Det Watt said she was also unable to release those details.
The shed was on land that comes under the auspices of the Department of Conservation, because it is within 1km of Doc land.
Doc Wakatipu Area manager Greg Lind said the Doc fire crew was not required on Tuesday night and he was not aware of what caused the fire.
The Queenstown Times understands several commercial operators were using sheds in the Shotover Delta area for storage.
The council obtained a High Court order requiring those commercial operators who had not already done so to vacate the site by this week, allowing the construction of the resa to begin.
A request for a copy of the order by the Queenstown Times was declined by the High Court at Invercargill.
Woodstock operator Shane McManus said nothing was left in the shed, which was used as an office, at the time of the fire.
He had not heard from police with regard to the cause of the fire.
"We had to move out anyway.
"We weren't too worried because there was nothing left in it anyway."
