The Swiss investigation into the mining giant comes on top of probes in the US and the UK.
Switzerland has opened a corruption investigation into mining and commodity giant Glencore and its activities in the Democratic Republic of the Congo.
Glencore, one of the world’s largest companies, announced earlier this month that Switzerland’s Office of the Attorney General is probing the company’s “failure to have the organizational measures in place to prevent alleged corruption” in the DRC.
Swiss-based Glencore said it would cooperate with the investigation. It is reportedly the biggest western company operating in the DRC, Africa’s largest copper producer and a source of much of the world’s cobalt.