Boko Haram fighters killed older boys and men in front of their families before taking women and children into the forest where many died of hunger and disease, freed captives said on Sunday after they were brought to a government refugee camp.
Nigeria's military is confident it has Boko Haram cornered, but a final push to clear the Islamist militants from their forest hideouts is being hampered by landmines, it said on Saturday.
Nigeria's opposition All Progressives Congress (APC) declared an election victory on Tuesday for former military ruler Muhammadu Buhari and said Africa's most populous nation was witnessing history with its first democratic transfer of power.