A mine collapse at Congo’s key Rubaya coltan site has killed a number of miners. Officials and rebels sharply dispute the extent of the death toll. Congolese mining authorities said Wednesday that the collapse happened on Tuesday and left at least 200 dead. The M23 rebels who control the mine rejected that figure. An M23 official blamed bombings and said that only five people died. But a miner said that he helped recover more than 200 bodies. Rubaya sits in a conflict zone where M23 taxes the coltan trade. Congo supplies a huge share of coltan used in smartphones and computers.
