More than 200 killed in coltan mine collapse in eastern DRC, officials say
Rubaya mine produces about 15% of the world’s coltan, which is processed into tantalum, used in mobile phones Reuters More than 200 people were killed this week in a collapse at the Rubaya coltan mine in eastern Democratic Republic of Congo, Lumumba Kambere Muyisa, a spokesperson for the rebel-appointed governor of the province where the…