A controlled explosion has rocked residents on the Whangaparāoa Peninsula north of Auckland after a marine locator marker was found floating at Okoromai Bay.
The markers are pyrotechnic devices designed to ignite on contact with water, and are used to indicate a location at sea.
A Defence Force spokesperson said it was found in the water by a member of the public, and handed in to the Coast Guard, which called in the NZDF and police.
A cordon was put up around the beach, and it was blown up by a Defence Force ordnance disposal team.
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