Communal violence in the Central African Republic risks spiralling out of control, the UN Secretary General Ban Ki-moon has said.
He warned the Security Council that armed groups were inciting Christians and Muslims against each other.
Mr Ban also backed the establishment of a UN peacekeeping force before the crisis leads to widespread atrocities.
The impoverished country has been in a state of chaos since rebels seized power in March.
A rebel alliance known as Seleka ousted President Francois Bozize from office, replacing him with the alliance's commander, Michel Djotodia.