The police were called to a property in Te Puke, following what 1 NEWS understands to be the discovery of a live tank carcass.
1 NEWS It was said that the shell was unearthed by a man in the digger.
Police said they were called to the vacant property at around 4:15 pm and neighboring properties were evacuated.
A police spokesman confirmed that an "item" was found on the site in Te Puke that needs to be carefully discarded.
The New Zealand Defense Force has been notified and is on its way to the Auckland scene.