Buhari hails 'these dear daughters of ours' and vows to free other Chibok girls

Nigeria's president has vowed to "redouble" efforts to secure the release of nearly 200 schoolgirls who remain missing more than two years after being abducted by Boko Haram extremists.

President Muhammadu Buhari met for the first time with the 21 Chibok schoolgirls who were released last week after negotiations with Boko Haram.