Fighting broke out between Kiir 's government and supporters of Machar on December 15 in the capital city of Juba . U.N. Secretary - General Ban Ki - moon supports East African leaders ' call for peace . Ban says those responsible for violence and human rights violations ' will be held accountable ' Doctors Without Borders also calls for end to violence .
U.N. Secretary - General Ban Ki - moon supports East African leaders ' call for peace . Ban says those responsible for violence and human rights violations ' will be held accountable ' Doctors Without Borders also calls for end to violence .