Police have busted a "major" drug lab believed to be in the process of manufacturing thousands of ecstasy pills for New Year's Eve music festivals.
Officers have secured an inner-city commercial premises in Wellington where specialist Police Clan Lab staff and Environmental Science and Research scientists have begun to examine the scene.
Processing the "major drug-manufacturing site" is expected to take several days.
"This is a full-scale commercial operation," Detective Senior Sergeant Tim Leitch said.
"The lab includes powder, pills, chemicals and equipment including a pill press, which police believe has been used to manufacture ecstasy.