Koko River, Rusizi District, a river in the Rusizi District of southwestern Rwanda that is a right-hand tributary of the Ruhwa River
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Koko River, Rutsiro District, a river in the Rutsiro District of western Rwanda that flows into Lake Kivu
Its capital is Cyangugu, the major city of the Rwandan south-west and the district contains large parts of the former Cyangugu Province.