Félix Tshisekedi accuses his counterpart in neighbouring Rwanda of wanting to expand.
Some 40 million people will vote in a country the size of Western Europe, home to vast mineral resources.
Turkey wants to arrest Mohammed Hassan Cheikh Mohamud after a motorcycle courier died in a traffic accident.
A refinery that could make Nigeria self-sufficient in fuel receives its first delivery of crude oil.
The polls in a handful of constituencies could give the government a constitution-changing majority.
The term "coloured" is a slur in the US, but for millions of South Africans it is part of their identity.
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