The UN warns warring sides in South Sudan they face an arms embargo and sanctions if they do not honour a truce due to come into force on Saturday.
Chad sentences 10 members of the Islamist militant group Boko Haram to death on terror charges, after a three-day trial in the capital N'Djamena.
Ghana's authorities are investigating several universities over links to suspected recruitment for the so-called Islamic State (IS), officials say.
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