The fire department is on-site at Parliament after the delivery of a suspicious parcel.
A spokesman for Ardern confirmed it's not an explosive but precautions are being taken nonetheless. Several fire engines and the hazmat unit are at the scene.
A police spokeswoman said they were notified just after 10am about reports of "an item of interest" located at Parliament.
"Inquiries are underway to determine what the item is and assess any risk."
One area of Parliament has been isolated as a precaution, she said.