Boko Haram release video of kidnapped schoolgirls - demanding prisoner exchange

A new video released by Islamist militants Boko Haram claims to show around 100 girls kidnapped from a school in Nigeria last month. The group's leader, Abubakar Shekau, said they would be held until all imprisoned militants had been freed.

Related stories:  Video - The state of Nigerian governance and Boko Haram

Nigerian military had advance warning of Boko Haram attack that lead to kidnap of schoolgirls