This 98-page report catalogues atrocities for which Boko Haram has claimed responsibility. It also explores the role of Nigeria’s security forces, whose own alleged abuses contravene international human rights law and might also constitute crimes against humanity. The violence, which first erupted in 2009, has claimed more than 2,800 lives.

The report, which includes a photo essay, is based on field research in Nigeria between July 2010 and July 2012, and the continuous monitoring of media reports of Boko Haram attacks and statements since 2009. Human Rights Watch researchers interviewed 135 people, including 91 witnesses and victims of Boko Haram violence or security forces abuses, as well as lawyers, civil society leaders, government officials, and senior military and police personnel.