The UN Secretary-General said that parts of the strife-torn country with no history of violence were being drawn into the conflict, and entire Muslim communities had fled in what has been described as an "exodus of historic scale."
"The dark clouds of mass atrocities and sectarian cleansing loom over the Central African Republic," Ban told the UN Security Council.
"We must act together, we must act decisively and we must act now to prevent the worst," Ban said, warning the country risked a "de facto partition" if the violence continued.
"Communities that have no history of violent conflict are on a course that, if left unchecked, could lead to decades of debilitating conflict," he said.
Also Read
Referring to military deployments in the region by France, the European Union and the African Union, he said the Central Africa crisis represented an opportunity to "commit to the strongest possible cooperation and coordination between the United Nations, the AU and the European Union."
"Let us show what solidarity and concerted action can achieve for the people of the Central African Republic," he said.