Allegations of war crimes by both Israel and by Palestinian militant groups in territories occupied by Israel in 1967 are already under investigation at the International Criminal Court, which is independent of the U.N. But the impact of that investigation is unclear because Israel is not a member nation of the I.C.C. and does not recognize its jurisdiction.
Israel is, however, a signatory of the Genocide Convention, along with South Africa, which paved the way for the case at the International Court of Justice, also known as the World Court.