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Members of Lagos based civil society groups shout slogans calling for the release of missing Chibok school girls at the state government house, in Lagos, Nigeria, on May 5, 2014. Boko Haram on Monday claimed the abduction of hundreds of schoolgirls in northern Nigeria that has triggered international outrage, threatening to sell them as "slaves". "I abducted your girls," the Islamist group's leader Abubakar Shekau said in the 57-minute video obtained by AFP, referring to the 276 students kidnapped from their boarding school in Chibok, Borno state, three weeks ago. (Getty)