For three years South Sudan has tumbled deeper into self-inflicted chaos, and it now finds itself on the brink of something even more terrifying.
United Nations officials rarely use the words “genocide” and “ethnic cleansing,” but they now say potentially both could envelop the world’s youngest country.
Since violence flared in Juba in July and spread to the previously peaceful southern Equatoria states of South Sudan, 340,000 people have fled the violence into neighbouring Uganda.

A BBC story with Alastair Leithead.