A tiny radio-active capsule has gone missing on a motorway in Western Australia.
Hazardous materials experts have issued a red alert over the substance - which is 8 millimetres long and 6 millimetres wide.
It was being transported from a mine to a depot in Perth, when it's believed it fell off a truck.
At an emergency press conference called this morning, officials warned it carries a risk of skin damage, burns and even cancer.
