A third explosion hit a church in gadaka , in northern yobe state .
第三起爆炸事件发生在北方yobe州gadaka的一个教堂内。
Shortly afterwards three north korean doctors were murdered in the north-eastern state of yobe .
不久三名朝鲜医生在东北部的约贝州遇害。
Boko haram , a radical islamic sect killed at least 63 people in a spate of coordinated gun and bomb attacks in yobe , a state in nigeria 's northeast .
Early this month at least nine health workers were killed . Shortly afterwards three north korean doctors were murdered in the north-eastern state of yobe .
