A Palmerston North man was left in shock on Saturday night after finding a grenade in a paddock near his house.
The man, who hasn't given his name, told Fairfax he was taking his dogs out for a walk when he spotted the blue object lying in the grass - close to where his child goes to play.
"My daughter was up there playing earlier, and she would've grabbed it as well if she thought it was one of the dog's toys."
The man also initially mistook the grenade for a toy. But further inspection found that certainly wasn't the case.
"I bent down to pick it up and thought, 'Oh f***, that's not a toy.'"
The man called his brother who is in the army, sending him a photo of the bright blue object for further inspection.
"He was like, 'Bro, that's a live grenade.'"
The man rang up the New Zealand Defence Force for help - they told him to ring the police.
A police spokeswoman said a bomb disposal squad will be dispatched from Wellington to deal with it.
It's unclear if the grenade was actually live and dangerous.