Internal investigation underway at one of Rio’s flagship growth assets in Mongolia.
Rio Tinto’s Mongolian subsidiary, Oyu Tolgoi LLC, has launched an internal investigation into allegations of corruption and unethical conduct linked to procurement activities at its world-class copper mine in the Gobi Desert.
In a statement released on social media, the company confirmed that it has initiated a comprehensive internal inquiry and has also sought the cooperation of law enforcement authorities.
“We are aware of allegations involving procurement-related activities,” Oyu Tolgoi said. “As the investigation is ongoing, we are unable to provide further comment at this time.”
Rio Tinto, which owns 66% of Oyu Tolgoi LLC, operates the vast underground mine in partnership with the Mongolian government, which holds the remaining stake. The project remains one of Rio’s most critical assets, expected to become the world’s fourth-largest copper producer by 2030.
Production at Oyu Tolgoi surged 78% in the last quarter, reflecting progress in underground development. However, the project’s history has been dogged by cost overruns, political friction, and repeated delays, all of which have strained relations between Rio Tinto and the Mongolian government.
The latest probe comes as Rio seeks to strengthen its governance and compliance practices across global operations, particularly amid rising scrutiny of mining conduct in developing economies.
Copper remains central to Rio Tinto’s long-term growth strategy as it looks to diversify beyond iron ore and expand its exposure to the energy transition metals essential for electrification and emerging technologies such as data centers.
