UN Secretary-General Ban Ki-moon tells Central African Republic not to repeat Rwandan genocide . Christian and Muslim militias have been battling for control in the nation . The United Nations says more than 1,000 people were killed during a recent attack on Bangui's airport by armed gangs that included former Seleka fighters who defected from their rebel group last year. Preparations for a U.N. peacekeeping force are under way , but it would need Security Council approval .
UN Secretary-General Ban Ki-moon tells Central African Republic not to repeat Rwandan genocide . Christian and Muslim militias have been battling for control in the nation . Chad pulls 850 troops from African-led peacekeeping force after allegation of attack by its soldiers . Preparations for a U.N. peacekeeping force are under way , but it would need Security Council approval .