Rebels occupying Twangiza Mining's gold concession in eastern Democratic Republic of Congo (DRC) have looted at least 500kg of bullion since May, the company told Reuters, accusing some of its own employees of aiding the theft.
At current prices, the looted gold is worth around $US70 million ($A108 million).
The mine is located in South Kivu province, where Rwandan-backed M23 rebels staged a lightning offensive this year that allowed them to seize more territory than ever before. They seized the mine in May.
"With the help of some employees, they transported the first batch of more than 50kg of gold out in a very short time," Twangiza Mining said in response to queries about losses since M23 seized the mine.
"Since the occupation, they have obtained at least 500kg of gold and secretly