Although it is a war crime to conscript or use child soldiers under age 15 in active hostilities, the practice continues in at least 19 countries, Amnesty International said on Tuesday, citing the charity Child Soldiers International.

Amnesty has documented the recent use or allegations of use of child soldiers in MaliCentral African RepublicChadCôte d’IvoireDemocratic Republic of CongoSri LankaSomalia, and Yemen.  As well as perpetrating human rights abuses themselves, many child soldiers are killed, maimed or become victims of rape and other sexual violence.

Poorly regulated weapons sales continue to contribute to the use of boys and girls in hostilities by armed groups and government forces, despite the protective Optional Protocol to the Convention on the Rights of the Child agreed by 150 countries, the rights group said in a statement issued to mark International Day against the Use of Child Soldiers.

A strong Arms Trade Treaty (ATT) – on which final talks are due at the United Nations in March — would help to end the forced recruitment of child soldiers by stopping the flow of arms to governments and armed groups that abuse human rights, Amnesty said.

“The Arms Trade Treaty must require governments to prevent arms transfers that would be used to commit violence against children and include rules to stem the flow of weapons into the hands of the government forces and armed groups responsible for war crimes or grave abuses of human rights,” said Brian Wood, Amnesty’s head of arms control and human rights.