Nigeria's Boko Haram militants are increasingly using children -- nearly three-quarters are school-aged girls -- to carry out suicide bombings, the United Nations Children's Fund reported Tuesday.
The report said 44 children were involved in Boko Haram suicide attacks in 2015 -- a tenfold increase from just four children used a year earlier.
Over the past two years, one in five Boko Haram suicide bombers was a child and 75 percent of those children were girls, according to the report.