Updated

The U.N.'s deputy secretary-general says a U.N. peacekeeping operation will be needed in the Central African Republic, which is descending into "complete chaos" that may lead to religious and ethnic conflict and even civil war.

Jan Eliasson urged the Security Council and the international community on Monday to take decisive action to support the African Union-led peace operation in the country and prepare for its transformation into a U.N. peacekeeping operation.

Last week, Secretary-General Ban Ki-moon presented four options to the council to support the AU-led operation financially and logistically and a fifth option to transform it into a U.N. peacekeeping force.

Eliasson told the council the security situation in the Central African Republic has become so desperate that "we believe that a United Nations peacekeeping operation will be needed."