Police have uncovered $500 million worth of chemicals in regional Victoria which they allege were due to be made into tonnes of methylamphetamine.
A 200-acre rural property in the Wimmera region was searched by the clandestine laboratory squad and Horsham crime investigation unit on Tuesday.
Police say they found more than 50 drums of methylamphetamine precursor chemicals that weighed more than 10 tonnes, and seized two unsecured firearms, ammunition and a small amount of methylamphetamine.
A 59-year-old man was arrested at the address and later released.
Police say the chemicals could make up to 5 tonnes of methylamphetamine. (ABC News: Stephen Cavenagh)
The find is part of a 20-month-long investigation into an alleged drug trafficking operation in Victoria, with police shutting down three clandestine laboratories in Coburg North, Pascoe Vale and Monegeetta during that time.
A 44-year-old Newport man was also charged earlier in the year as part of the operation, after a man and woman allegedly carried 6 kilograms of MDMA hidden in a sleeping bag onto the Spirit of Tasmania ferry at the Port of Geelong on August 21.
He was charged with trafficking a large commercial quantity of MDMA and has been remanded to face Melbourne Magistratres' Court later this month.
As part of the investigation, which started in February last year, officers have also recovered more than $1 million in stolen vehicles and motorbikes that were being used in a re-birthing operation, seized eight firearms, and charged eight people.
They have also seized commercial quantities of methylamphetamine, amphetamines and cannabis.
Investigations are ongoing.