The victims were slain Saturday, a day after an explosion at a bomb factory killed three Boko Haram suspects, The Guardian (Nigeria) reported Monday.
Violence in Nigeria linked to Boko Haram has forced 10,000 students out of school, The Daily Trust reported.
The militant group's name translates to "Western education is prohibited" and it widened its targets late last year to include schools. At least 12 schools have been attacked recently, the newspaper said.
The Daily Trust said no education officials were willing to comment but teachers said an estimated 10,000 students were forced to remain at home after their schools were destroyed.
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