REPUBLIKA.CO.ID, UNITED NATIONS -- Boys and girls in northeast Nigeria continue to be brutalized as a result of Boko Haram's insurgency in the region and the ensuing conflict, which is the conclusion of UN Secretary-General Antonio Guterres's first report on children and armed conflict in the West African country, a UN spokesman told reporters here Thursday.

The new UN report documented the impact on children of the severe deterioration of the security and humanitarian situation in the country between January 2013 and December 2016, UN spokesman Stephane Dujarric said at a daily news briefing here.

Virginia Gamba, the special representative of the secretary-general for children and armed conflict, said that Boko Haram has inflicted unspeakable horror upon the children of Nigeria's northeast and neighboring countries.

During the reporting period, attacks by Boko Haram on communities and confrontations between the group and security forces resulted in at least 3,900 children killed and 7,300 more maimed. Suicide attacks became the second leading cause of child casualties, accounting for over one thousand deaths and 2,100 injuries during the reporting period.