A girl was stopped by authorities at the entrance to a Nigerian market before explosives she was carrying killed her and 19 others yesterday, an official tells CNN. The bombs were attached to the girl, whose age isn't clear, CNN reports; estimates have put her as young as 10 or as old as 18. Boko Haram militants are suspected in the Maiduguri attack; a source to the news organization says the militants capture young people to "do their dirty work." The group is said to be responsible for up to 2,000 deaths in recent weeks. Today, violence continued, with two female suicide bombers killing at least four at another market, the BBC reports. (More Nigeria stories.)