The United Nations has said that one million of the 37 million Nigerian children expected to start the new school year this month will likely stay away because of the threat of violence after a series of mass kidnappings and attacks targeting students. This, the UN children’s agency UNICEF said, as there have been 20 attacks on schools in Nigeria this year with more than 1 400 pupils having been taken and 16 having died. Most have been released after ransom negotiations, but only after weeks or months in captivity, often in appalling conditions in rural camps.