Worker walks in an underground mine, part of the Grasberg copper and gold mine operated by an Indonesian subsidiary of Freeport-McMoRan Inc, near Timika, Papua province

Worker walks in an underground mine, part of the Grasberg copper and gold mine operated by an Indonesian subsidiary of Freeport-McMoRan Inc, near Timika, Papua province

A worker walks in an underground mine, part of the Grasberg copper and gold mine operated by an Indonesian subsidiary of Freeport-McMoRan Inc, near Timika, Papua province February 14, 2015 in this photo taken by Antara Foto. REUTERS/M Agung Rajasa/Antara Foto

February 3, 2017 10:53 AM (UTC+8)