Police are tight-lipped about an operation that has seen at least two rural Northland properties put under lockdown as officers carried out search warrants across the region.
The two rural properties were on State Highway 14 in an area known as Wheki Valley, 21km south-west of Whangarei, had armed police guards and numerous officers searching on Monday.
One property had a half round hay barn and containers on site and the other was a house at the end of a track just a few hundreds metres away on the state highway.
Officers at the scene said they were unable to comment and in a written statement police were said they were carrying out multiple pre-planned search warrants in Northland as part of an ongoing operation.