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Primary schoolchildren have become the latest targets for abduction by gunmen in northern Nigeria. A number of children were taken, along with their teachers, just days after students were kidnapped from a college in Kaduna. There was a relative lull in school abductions since the high profile kidnapping of the Chibok girls in 2014, but there have been five abductions in recent months. And this is the first time such young children have been attacked. Focus on Africa's Bola Mosuro asks security analyst Bulama Bukarti, from the Extremism Policy Unit of the Tony Blair Institute for Global Change, why these incidents are happening with increasing regularity. (Picture: A schoolbag and shoes are left abandoned after an abduction from a school in Katsina State in December. Credit: Getty Images)