Police have uncovered a makeshift gold processing plant in the backyard of a Kalgoorlie-Boulder house.
Police said they discovered the rough-and-ready plant at a Carrington Street address in Western Australia when they were executing a search warrant issued for drugs, the ABC reports.
Gold stealing detection unit’s Dave Tobin said initial findings suggest mercury was being used in the extraction process.
"Mercury, if not dealt with correctly, can be quite dangerous and harmful to one's health," he said.
"As a result the place was cordoned off; we're waiting for the chem centre, environmental protection and also DFES to come in and assess it, and deal with that appropriately."