Two men have been charged after 13kg of meth and nearly $4 million in cash was allegedly discovered by Police last month.
The operation saw the Drug & Firearm Squad stop a truck on Great Eastern Highway, near Sawyers Valley Monday, September 21.
When searched it will be alleged $3.88 million in cash was located in two plastic tubs.
The 58-year-old truck driver from New South Wales, Peter James Wright, was arrested.
The discovery then lead investigators to a residence in Lockridge, where it's alleged two bags containing a total of 13 packages, each containing around 1kg of methylamphetamine, was found.
A 29-year-old man from Lockridge, Shaun Wayne Kelly, was arrested.
Mr Wright has been charged with laundering property/money from proceeds of major offence and is due to reappear in a Midland Magistrates court today.
Mr Kelly from Lockridge has been charged with possessed a trafficable quantity of methylamphetamine with intent to sell or supply and will reappear in the Perth Magistrates court tomorrow.
Three other men were also arrested in the course of the investigation and have been charged with separate drug offences.
Waikiki P-plater charged with reckless driving along Kwinana Freeway
Police investigate Peron scrub fire
Mandurah teacher allegedly gives birth to student's baby
Australia Day in Rockingham and Mandurah
Police investigate after man stabbed in the neck in Madora Bay
Teen boy tragically killed in horror Mandurah crash
18-year-old male from Lakelands charged over incident in Pinjarra
Hayden Ballantyne signs with Rockingham Rams