NSW Police found 390kg of methamphetamine stashed evenly across 39 large buckets, 140 cardboard boxes full of foam and packaging, and Aldi shopping bags.
The neatly marked and numbered bags of the white crystalline substance were discovered at an Emu Plains home in far western Sydney on April 28.
Police arrested a 15-year-old alleged drug mule at the scene who is believed to be part of a larger organised crime network importing drugs.
He was charged with supplying a commercial quantity of a prohibited drug and previously appeared in a children's court.
The arrest came amid a series of raids on homes allegedly linked to the crime group.
The alleged local facilitator for an offshore criminal syndicate was also detained after officers found a black sports bag containing magazines and nearly 500 rounds of ammunition during a raid on April 29.
On Wednesday, detectives conducted 11 more raids arresting six people, before arresting another woman on Thursday.
In total, nine people have been charged with various drug trafficking and supply offences.
Assistant Police Commissioner Scott Cook, said the arrests had broken up a drug network involved in violence on the streets of NSW.
"Almost all involved in this 400kg importation are now behind bars – from the onshore coordinator to the runners and every link in the chain between," he said on Thursday.
16°C