maiduguri nigeria suicide bomb attackers kill 10 people wound 30 northeast nigerian city maiduguri wednesday emergency agency official say islamist militant group boko haram kill 20,000 people since 2009 part attempt create islamic state lake chad basin one immediately claim responsibility late attack emergency officials members government-approved vigilante group say carry four female bombers muna garage district maiduguri 06:00 p.m. 1700 gmt use female bombers hallmark boko haram attack far record 10 people deaths 30 victims injure say bello dambatta spokesman state emergency agency sema maiduguri capital borno state city bad hit jihadist insurgency least 221 people kill bomb gun attack northeast nigeria since june accord reuters tally suicide bombers kill 10 nigeria 's maiduguri emergency official