Police are currently are carrying out a search warrant in relation to Operation Cosmos - the investigation into the disappearance of Waiuku man Lance John Murphy.
Armed police stormed a property on Noakes Rd near Puhoi just after 5pm.
The police helicopter Eagle hovered over the property for some time, said a Herald videographer at the scene.
Police have stopped residents from entering the area and forensic officers have moved in.
An ambulance and Armed Offenders Squad are also en route in a support capacity.
It is understood the warrant is not in relation to the current location of Steven Brent Gunbie, believed to be connected to Mr Murphy's disappearance and on the run from police.
The Herald has learned the warrant will take place at an "address of interest" to the investigation.
The search could take up to three days.
READ MORE: What's happened to Lance John Murphy?
'He has disregarded our voice and continued with this divisive kaupapa.'