Article from the website bbc.co.uk.
New evidence is emerging of alleged ethnic killings committed during more than a week of fighting in South Sudan.
The violence follows a power struggle between President Salva Kiir, a Dinka, and his Nuer ex-deputy Riek Machar.
A reporter in the capital, Juba, quoted witnesses as saying more than 200 people, mostly ethnic Nuers, had been shot by security forces.
The UN says it has discovered a mass grave in Bentiu in the oil-rich Unity State, containing about 75 bodies.
Click on link to read more http://www.bbc.co.uk/news/world-africa-25502457.