At least 71 killed in terrorist attack in Nigeria, an act President Goodluck Jonathan has blamed on Boko Haram.

A police spokesperson said no group had yet claimed responsibility for the bombing, but Boko Haram's involvement would not be a surprise. The movement, based in the country's disproportionately poor northern states, is a confederation of Islamic militants who seek the overthrow of secular authorities and have been involved in a cycle of large-scale violence and reprisal with the central government since 2009. Boko Haram has carried out fatal attacks on schools, churches, and a United Nations compound, and it is considered a terrorist organization by the State department. Both this United Nations report and this Council on Foreign Relations paper, however, find Nigeria's government culpable in the spread of violence.