London gold body reviews purity concerns about Indonesian state miner
Investigators said over the period of 2010-2021, former managers at Antam oversaw production of around 109 tons of gold through an alleged illegal practice.
Japanese Industry Minister Ken Saito praised his country's ties with the US but declined to comment directly on Nippon Steel's $14.9 billion proposed acquisition of US Steel.
ENRC has always denied any wrongdoing and argued the UK's Serious Fraud Office would not have launched its investigation if it had not first induced the company's former lawyer to act against its interests.