Two ambulances were waiting about 100m from Kakapo Rd and two helicopters were seen scouring the area.
Southern Lakes Helicopter chief pilot Sir Richard Hayes, who lives near Te Anau, said a helicopter had picked up members of the Invercargill armed offenders squad from near Winton to fly them to the scene.
He said officers and a police dog had come through his section in Tutoko Lane searching for a person, but he did not think anyone had been on the property.