An Anti-Balaka fighter, member of a militia opposed to the Seleka rebel group, puts a knife to his throat showing what he would do to any Seleka, on the outskirts of the Boy-Rabe neighborhood in Bangui on December 14, 2013. France raised alarm on December 13 over worsening violence in the Central African Republic, as UN chief Ban Ki-moon urged warring Christians and Muslims to stop the bloodshed that has left more than 600 dead in the past week. (Photo by Ivan Lieman/AFP Photo)

Anti-Balaka fighters, members of a militia opposed to the Seleka rebel group, pose with weapons and amulets in a village in the Boy-Rabe neighborhood in Bangui on December 14, 2013. (Photo by Ivan Lieman/AFP Photo)

Anti-Balaka Christian militiamen gather in a forest clearing outside Central African Republic's capital Bangui, Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

Displaced refugees camp at an airport in Bangui December 15, 2013. (Photo by Emmanuel Braun/Reuters)

Former FARCA (Central African Republic Forces) soldiers linked to Anti-Balaka Christian militiamen who have set camp in a school in the Boeing neighborhood of the Central African Republic's capital Bangui pose Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

An Anti-Balaka fighter, member of a militia opposed to the Seleka rebel group, lifts up a machete threatening any Seleka that may attack, on the outskirts of the Boy-Rabe neighborhood in Bangui on December 14, 2013. (Photo by Ivan Lieman/AFP Photo)

Anti-Balaka fighters, members of a militia opposed to the Seleka rebel group, pose with weapons and amulets in a village in the Boy-Rabe neighborhood in Bangui on December 14, 2013. (Photo by Ivan Lieman/AFP Photo)

Former FARCA (Central African Republic Forces) soldiers linked to Anti-Balaka Christian militiamen who have set up camp in a school in the Boeing neighborhood of the Central African Republic's capital Bangui pose Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

A former FARCA (Central African Republic Forces) soldier linked to Anti-Balaka Christian militiamen guards their camp in the Boeing neighborhood of the Central African Republic's capital Bangui Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

Anti-Balaka Christian militiamen walk through a forest clearing outside Central African Republic's capital Bangui Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

Anti-Balaka Christian militiamen walk through a forest clearing outside Central African Republic's capital Bangui Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

Anti-Balaka Christian militiamen walk through a forest clearing outside Central African Republic's capital Bangui Sunday December 15, 2013. The leader of the Christian militia says his fighters won't put down their rebellion until President Michel Djotodia is gone from power, raising the specter of a prolonged sectarian conflict in the country. More than 600 people have been killed since Anti-Balaka launched a strike over Bangui last week before being pushed back. (Photo by Jerome Delay/AP Photo)

Anti-Balaka fighters, members of a militia opposed to the Seleka rebel group, show what they would do to any Seleka, in the Boy-Rabe neighborhood in Bangui on December 14, 2013. (Photo by Ivan Lieman/AFP Photo)

An anti-Balaka Christian militiaman stands in a forest clearing outside Central African Republic's capital Bangui, Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

Anti-Balaka Christian militiamen walk through a forest clearing outside Central African Republic's capital Bangui Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

A Christian woman walks past the shell of an unfinished basilica at the St Jean des Cascades church in Bangui, Central African Republic Monday December 16, 2013, where she and over 10,000 others have found refuge. More than 600 people have been killed since Anti-Balaka forces launched a strike over Bangui last week before being pushed back. (Photo by Jerome Delay/AP Photo)

Anti-Balaka Christian militiamen walk through a forest clearing outside Central African Republic's capital Bangui Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)

Former FARCA (Central African Republic Forces) soldiers linked to Anti-Balaka Christian militiamen in a camp set up in a school in the Boeing neighborhood of the Central African Republic's capital Bangui Sunday December 15, 2013. (Photo by Jerome Delay/AP Photo)