Katanga, which operates cobalt and copper mines in the DRC, said Aristotelis Mistakidis, Liam Gallagher and Tim Henderson had tendered their resignations.
The miner denied it had decided to suspend the sale of a stake in its loss-making New Caledonia nickel mine (VNC), and added that its plan to find a partner is still a go.
President Rodrigo Duterte's decision not only ignores demands from pro-mining groups but also from members of his own government, including the current environment minister Roy Cimatu.
"Hedging by means of long-term (supplier) contracts is [] way to control such new issues (of securing materials supplies)," says VW head of sustainability.
