Rwanda is holding more than 280 troops accused of desertion on an island in Lake Kivu, the army has revealed.

BBC: Rwandan army deserters 'held on Lake Kivu island'

Mont Rubavu is situated in Gisenyi, a city of more than 100 000 inhabitants which shares the highest lake in Africa, Lake Kivu, with the Democratic Republic of Congo.

UNESCO: Ecological Sciences for Sustainable Development

Scientists have warned that if nothing is done, millions of people living around Lake Kivu are in danger.

BBC: 1986: Hundreds gassed in Cameroon lake disaster

It revealed that Lake Kivu, in Rwanda, is becoming saturated with carbon dioxide just as Lake Nyos was, and is seriously at risk of lake overturn.

BBC: 1986: Hundreds gassed in Cameroon lake disaster