A tragic mine collapse in Rubaya, eastern Democratic Republic of Congo, has killed over 200 people. The accident happened on Wednesday due to a landslide at a coltan mine. This mine produces about 15 percent of the world's coltan, a mineral used to make tantalum for phones, computers, and aerospace parts. Lumumba Kambere Muyisa, a spokesperson for the rebel-appointed governor, said, "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." Around 20 injured victims are currently receiving medical treatment. The collapse was caused by seasonal rain. "We are in the rainy season. The ground is fragile. It was the ground that gave way while the victims were in the hole," Muyisa explained. An adviser to the governor confirmed at least 227 deaths so far. The mine is controlled by the AFC/M23 rebel group since 2024. The United Nations says this group exploits local minerals to fund its fight backed by Rwanda's government—an accusation Rwanda denies. The rebels say their goal is to overthrow the government in Kinshasa and protect the Congolese Tutsi minority. They have taken over more mineral-rich land in eastern Congo during a swift advance last year.