Children are vulnerable victims of armed conflict in several ways. They are killed, maimed, abducted, orphaned, recruited as child soldiers, and subjected to sexual violence. The UN considers the killing or maiming of children, recruitment of child soldiers, attacks on schools and hospitals, denial of humanitarian access, abduction of children, and rape or sexual abuse of children to be "grave violations" of children's rights in conflict situations. These violations continue to occur on an alarming scale in over 36 countries where child soldiers, some as young as 8 years old, are being used.