ABUJA - The Islamist militant group Boko Haram claimed responsibility on Monday for the abduction of more than 200 schoolgirls in northeast Nigeria last month and threatened to "sell them on the market", the French news agency AFP reported, citing a video.



Boko Haram on April 14 stormed an all-girl secondary school in the village of Chibok, in Borno state, then packed the teenagers, who had been taking exams, onto trucks and disappeared into a remote area along the border with Cameroon.



The brazenness and sheer brutality of the school attack shocked Nigerians, who have been growing accustomed to hearing about atrocities in an increasingly bloody five-year-old Islamist insurgency in the north.



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