The United Nations Secretary-General has called for the “immediate and unconditional” release of hundreds of boys, believed abducted by suspected bandits, after an attack on their school in northwest Nigeria. More than three hundred children are reported to be still missing, with many feared abducted, after armed gunmen stormed the all boys Government Science Secondary School in Kankara, Katsina state, late Friday evening (local time). In a statement issued by his spokesperson, Secretary-General Antonio Guterres strongly condemned the attack and called for the children’s safe return to their families.  “He reiterates that attacks on schools and other educational facilities constitute a grave violation of human rights. He urges the Nigerian authorities to bring those responsible for this act to justice,” the statement added.