UNITED NATIONS - United Nations Secretary-General Ban Ki-moon called on the UN Security Council to take "urgent action" on Syria amid daily atrocities and rights abuses, warning the war-torn country would otherwise slip deeper into chaos.In his monthly report to the council on Syria aid access, seen by Reuters on Wednesday, Ban did not specify action, but his former aid chief Valerie Amos appealed in April for an arms embargo and sanctions for violations of humanitarian law."I also ask the council to take urgent action in the face of the continuing atrocities and human rights abuses taking place in Syria on a daily basis," Ban wrote in the June 23 report. "Lack of action will throw Syria deeper into chaos and deprive the country of a peaceful and prosperous future."The council failed last year to refer the four-year war in Syria to the International Criminal Court for war crimes and crimes against humanity. Syrian ally Russia, backed by China, vetoed the move and three other resolutions threatening President Bashar Assad's government with sanctions.