"A World War II grenade sucked up by contractors cleaning out a Mosgiel sewage drain on Tuesday morning was missing its detonator, say police. The Mills-type grenade contained explosives but did not have the arm and pin which would have set it off.
"The chances of it exploding were pretty slim," said Senior Sergeant Bruce Ross of Dunedin police.
A section of Mosgiel, west of Dunedin, was cordoned off about 10.30am when contractors sucked up something which blocked their vacuum tube.
"We were sucking out the sewerage and the hose blocked up, which happens all the time," Delta drainage technician Marc Layne told the Southland Times."
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Drain contractors suck up WWII grenade in Mosgiel | NATIONAL News