Excerpt from S/PRST/2017/21, par. 14 and par. 18

[par. 14] ... (c) Urges Member States to ensure that attacks on schools in contravention of international humanitarian law are investigated and those responsible duly prosecuted; ... [par. 18] The Security Council emphasizes the responsibility of all States to put an end to impunity and to investigate and prosecute those responsible for genocide, crimes against humanity, war crimes and other egregious crimes including when perpetrated against children and takes notes in this regard of the contribution of the international criminal justice system, ad hoc and mixed tribunals as well as specialized chambers in national tribunals.