The area around Taupō Museum has been evacuated and cordoned off after staff found what is believed to be an old missile.
In a Facebook post shortly after 3pm, Taupō District Council said an old missile had been found among its collection in Taupō Museum.
"We can't confirm if it's decommissioned or not."
The post said the Defence Force was on its way to take a closer look.
"In the meantime, we've cordoned off the area by the museum, the rose gardens and the playground on Tongariro South Domain as a precaution."