Kano - An explosion ripped through a school in northeast Nigeria on Monday, as students gathered for morning assembly before classes began a teacher and a medic told AFP.
The blast happened at the government comprehensive senior science secondary school in Potiskum, Yobe state, as students waited to hear the principal's daily address.
"The students had gathered for the morning assembly when something exploded in their midst with a thunderous sound at exactly 07:50", said one teacher, who asked not to be identified.
"The explosion has affected many students but I can't say how many because we are now evacuating the victims to the hospital which is just 100m away", the teacher added, sobbing.