A mine collapse triggered by a landslide in Rubaya, eastern Democratic Republic of Congo, killed more than 200 people on Wednesday, local authorities said.The collapse occurred at a coltan mine that produces around 15 per cent of the world’s supply of the mineral, which is processed into tantalum used in mobile phones, computers, aerospace components and gas turbines.Lumumba Kambere Muyisa, spokesperson for the rebel-appointed governor of the province, said the exact toll remains unclear. “More than 200 people were victims of this landslide, including miners, children and market women. Some people were rescued just in time and have serious injuries,” he told Reuters, adding that about 20 injured people were being treated in health facilities.He said the collapse was linked to seasonal conditions. “We are in the rainy season. The ground is fragile. It was the ground that gave way while the victims were in the hole.”An adviser to the governor said the number of confirmed dead was at least 227. The Rubaya mine has been under the control of the AFC/M23 rebel group since 2024. The United Nations says the group has plundered the area’s mineral resources to help fund its insurgency, backed by the government of neighboring Rwanda, an allegation Kigali denies.The heavily armed rebels say their aim is to overthrow the government in Kinshasa and ensure the safety of the Congolese Tutsi minority. They captured more mineral-rich territory in eastern Congo during a rapid advance last year.