Rio Tinto Group has suspended its underground operations in Oyutaleghe, a major copper mine in Mongolia. The company said in a statement on Friday that an earthquake on Thursday caused the rock to collapse, injuring three workers. The statement said that operations have now been suspended and the company is conducting a safety review. Affected by this news, the mining company's stock price fell 2.9% during early trading in Sydney. Oyu Tauragai is one of the world's largest copper and gold mines, and 80% of its value lies deep underground. According to the latest operating update, the mine currently produces 450,000 tons of copper per annum. The interruption of this operation may worsen the already tight supply of raw materials. Rio Tinto holds 66% of Oyu Tauragai's shares.

Rio Tinto Group has suspended its underground operations in Oyutaleghe, a major copper mine in Mongolia. The company said in a statement on Friday that an earthquake on Thursday caused the rock to collapse, injuring three workers. The statement said that operations have now been suspended and the company is conducting a safety review. Affected by this news, the mining company's stock price fell 2.9% during early trading in Sydney. Oyu Tauragai is one of the world's largest copper and gold mines, and 80% of its value lies deep underground. According to the latest operating update, the mine currently produces 450,000 tons of copper per annum. The interruption of this operation may worsen the already tight supply of raw materials. Rio Tinto holds 66% of Oyu Tauragai's shares.