Although most of its targets have been in the northeast, Boko Haram has hit Abuja several times before, including an attack on the UN national headquarters in 2011. In April, more than 70 people were killed in a bomb blast at a bus stop on the outskirts of the capital in an attack claimed by the extremist group. In May, a car bomb near a bus station in the suburbs killed at least 19 people and injured 60 others.
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