What happened in Mangala, where residents were left with little outside support, helps explain how this outbreak became the worst seen in the Democratic Republic of Congo.
The conflict is raising fears of a regional war in the Horn of Africa, drawing in foreign powers including Eritrea, Egypt, the United Arab Emirates and Saudi Arabia.
Fighters with the Oromo Liberation Army, one of the rebel groups that say they have joined forces, during an orientation session in western Oromia, Ethiopia, last year.
Dozens more are missing after shafts collapsed on Sunday, according to a charity, which said that the chances of rescuing those trapped were “limited” because of a lack of specialized equipment.
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