Boko Haram (ボコ・ハラム) is an Islamic extremist group that operates in northern Nigeria. Boko Haram — the name means "Western education is sinful" — was founded in 2002 as an indigenous group, but turned itself into a Jihadist group seven years later. The group forbids interaction with the Western world, and also opposes the Nigerian government. Islamist militants from the group abducted more than 250 girls from a school in the northern town of Chibok on April 14. Boko Haram chief Abubakar Shekau has threatened to sell the girls as "slaves."