Sudan seems to have sided with Egypt in its row with Ethiopia over a dam on the River Nile.
Mahamat, 37, is the same age as the late Idriss Déby when he seized power in 1990.
Mahamat Déby is one of the sons of the late president Idriss Déby and will lead Chad during a military transition.
Idriss Déby's son is to lead an army council for 18 months after the president died in battle.
Ghana’s car industry is dominated by men but a group of female engineers is aiming to break the gender barriers.
In power for 30 years, Idriss Déby's death leaves huge uncertainties at the heart of government.
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