The police said on Monday that a specialist explosives squad was securing a Hokitika property after the discovery of chemicals commonly used to make explosives.
They say a Fitzherbert Street house was searched on Sunday night and two teenagers arrested for unrelated matters. A large assortment of chemicals commonly associated with the manufacture of explosives and pyrotechnics was also found.
The property has been cordoned off and the explosives team from Burnham Army Camp has been identifying the chemicals and making the area safe.
No charges have been laid in relation to the chemicals, but a 17-year-old is helping police with the enquiry.