More than 150,000 people have fled into neighboring countries as a result of the violence , according to the United Nations refugee agency , and Boko Haram has spread its reign of terror into villages and towns beyond Nigeria 's borders . Suicide bombers target a busy bus station in the city center of Kano in northern Potiskum . just hours before , a single bomber blew up a bus in Nigeria , Yobe state . No one has claimed responsibility , but Resident Ahmad Maina has been blamed in numerous attacks in the more than 200 cities .
Suicide bombers target a busy bus station in the city center of Kano in northern Potiskum . just hours before , a single bomber blew up a bus in Nigeria , Yobe state . No one has claimed responsibility , but Resident Ahmad Maina has been blamed in numerous attacks in the more than 200 cities .