(Reuters) – Forced cannibalism, mutilation of bodies, conscription of child soldiers and other human rights abuses have marked the war in South Sudan and may amount to violations of international law, an African Union (AU) report said on Wednesday. Fighting broke out in the world’s youngest nation in December 2013, less than three years after it won independence from Sudan, between forces loyal to President Salva Kiir against those allied with his former deputy Riek Machar.