(File photo) Photo: RNZ / Angus Dreaver
A homemade bomb blew up near a police officer during a search at a property in Feilding.
Police said a man was arrested on Thursday following a tip that he had a prohibited military-style semi-automatic firearm.
An improvised explosive device was found during a later second search.
While the Defence Force's explosive ordnance disposal team were securing the homemade bomb, another detonated near a police officer.
The officer was not injured.
Nearby properties were evacuated while the rest of the property was searched.
A 43-year-old man was due to appear in Palmerston North District Court today on firearms charges.