The death toll has risen to 49 after a suicide bomber disguised in a school uniform blew himself up at a boys' secondary school in northern Nigeria on Monday. 57 people were injured. Other reports put the number of injured victims at 79 in the attack in Yobe state, which took place as students were in the yard of the boarding school during the morning roll call. All schools in the town are closed now. The attack came six days after a similar one on a Shi'ite Islamic school in Potiskum, in which 30 people died. Boko Haram targeted both schools. The UN Children's Fund (Unicef) said attacks on children are attacks ‘on the future of Nigeria’, warning that the country already has the largest number of children out of school in the world. (see item 2 below)