Nigeria, April 20 -- President Muhammadu Buhari has expressed sadness over "the sudden and tragic death of President Idriss Deby of Chad on the front line, fighting against rebel soldiers."

The Nigerian leader was, however, silent on the constitutional violation, which saw the Chadian army take over the government and jettison a constitutional transition.

PREMIUM TIMES reported how the army said it was suspending the constitution, dissolving the parliament and imposing a military council, following the death Tuesday of Mr Deby, who had ruled Chad for over 30 years.

The military council will be led by Mr Deby's 37-year-old son, Mahamat Kaka, who is an army general.

Based on the Chadian constitution, the speaker of the parliament should...