Mr Cong urged the government to act quickly to restore peace in the region.
Before the adoption, U.S. acting representative Dorothy Shea called on the international community to bring South Sudan “back from the brink”.
Several South Sudan People’s Defence Forces (SSPDF) members were killed during the United Nations Mission in South Sudan (UNMISS) to extract them from the area.
Mr Lacroix made the call while briefing the UN Security Council on Monday at UN headquarters in New York.
It noted another bout of communal violence in Tambura town of Western Equatoria State that displaced more than 13,000 people.
Two-thirds of the people across South Sudan are food insecure, and over nine million people remain dependent on assistance.
