Nigerian officials have confirmed the release of 21 girls who were kidnapped from Chibok by Boko Haram militants in 2014.
A presidential spokesman confirmed their release follows negotiations between the Nigerian government and Boko Haram members, brokered by the International Red Cross and Swiss government.
He added: "The negotiations will continue."
Around 270 girls were taken from their school in Chibok. Dozens escaped in the initial melee and more than 200 are still missing.