Boko Haram released a video of the girls kidnapped from Chibok in April 2014, showing some who are still alive.
In the video a masked man stands next to the girls who have been identified as those kidnapped from Chibok in 2014. The fighter says some of the girls had been killed in air strikes. In the video, unidentified bodies could be seen on the ground.
About 2,000 girls and boys have been kidnapped by Boko Haram since the beginning of 2014, according to Amnesty International, which says they are used as cooks, sex slaves, fighters and even suicide bombers.