Boko Haram behind thousands of child deaths: Report

The U.N. report said Boko Haram regularly uses children suicide bombers.

Attacks by Boko Haram on communities and clashes between the group and security forces from 2013 up to this year have led to at least 3,900 deaths among people 18 and under in addition to more than 7,000 injured.

“With tactics including widespread recruitment and use, abductions, sexual violence, attacks on schools and the increasing use of children in so-called ‘suicide’ attacks, Boko Haram has inflicted unspeakable horror upon the children of Nigeria’s north-east and neighbouring countries,” Virginia Gamba, the UN Secretary-General’s Special Representative for Children and Armed Conflict, said in a statement on Thursday.

The U.N. said that thousands of children in northeast Nigeria and bordering countries have been recruited by Boko Haram. Investigators gathered testimony indicating that the group kidnapped many of the children it counts among its ranks but that others join voluntarily for economic gain or over pressure applied on their families by the group.

Last month marked three years since Boko Haram militants ambushed the small Nigerian town of Chibok in the middle of the night and abducted 276 schoolgirls before vanishing into the forest.

ABC News' Morgan Winsor contributed to this report.