Boko Haram, and Massacres Ruled by Whim

They came in the dead of night, their faces covered, riding on motorcycles and in pickup trucks, shouting “Allahu akbar” and firing their weapons.

“They started with the shootings; then came the beheadings,” said Hussaini M. Bukar, 25, who fled after Boko Haram fighters stormed his town in northern Nigeria. “They said, ‘Where are the unbelievers among you?’ ”

Women and girls were systematically imprisoned in houses, held until Boko Haram extracted the ones it had chosen for “marriage” or other purposes.