The UN child agency has declared that Boko Haram’s use of child bombers has increased over the last year with one in five suicide attacks now done by children.

Girls, who are often drugged, were behind three-quarters of such attacks committed by the militant Islamist group in Cameroon, Nigeria and Chad.

It is an 11-fold increase with four attacks in 2014 compared to 44 the next year, including January 2016.

The change in tactics reflects the loss of territory in Nigeria by the group.

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Aid work in Sierra Leone with Street Child

Gambia’s lost children