Castillo's administration is also seeking to renegotiate the country's most important energy contract.

Company has exercised its right to buy an additional 25% stake in Mozal Aluminium.

The facility is exceeding designed throughput rates, treating 320,000 tonnes of ore in the month ending Sept. 20.

A key focus of financial markets in the third quarter has been talks of policy tightening in the United States, which also boosted the dollar.

Milingo Lungu, has been charged with laundering more than $2 million.

The Andean nation's copper output fell to 466,928 tonnes in August.