SYDNEY: Parts of Western Australia were under a radiation alert on Saturday after authorities said a radioactive capsule used in mining was lost en-route to the state’s capital, Perth.

Authorities in Australia’s largest state issued the alert on Friday for a “radioactive substance risk” in several regions, including Perth.

The small, silver capsule containing Caesium-137 got lost during transport from north of Newman - a small town in the remote Kimberley region - to the northeast suburbs of Perth, the Department of Fire and Emergency Services said.