The UN investigation team confirmed "clear and convincing evidence" of the use of sarin delivered by surface-to-surface rockets,[18][29] and a 2014 report by the UN Human Rights Council found that "significant quantities of sarin were used in a well-planned indiscriminate attack targeting civilian-inhabited areas, causing mass casualties.
Results of the UN investigation into the Ghouta attack, which is only the most deadly of the chemical attacks during the war.