The report alleges that government forces are permitted to rape women in lieu of wages.
Violence erupted between youths from two rival ethnic groups in the camp.
A recent report has revealed that the conflict-riven country is failing the younger generation.
More than half of six to 15-year-olds in South Sudan are missing out on an education.
But Russia and Venezuela voiced concerns about the possible use of spy drones by the U.N. mission.
A look at why today's U.N appeals have trebled since 2005's $5 billion.
An official said three people on board survived.
A report from the group cited the discovery of mass graves, among other things.
The oil tanker veered off the road while traveling from the capital Juba to the Western Equatoria area.
Yet President Salva Kiir told regional African leaders at the ceremony that he still had "serious reservations."
Called the Sentry, the enterprise wants to uncover the flow of money that bolsters armed conflict on the continent.
The South Sudan Democratic Army (SSDA) Cobra Faction has released 1,314 children since January.
The warring sides also agreed to abide by a ceasefire deal signed in January 2014 but frequently violated.
Writer Alex Perry discusses the challenges of reporting on the vast and diverse continent and the growth of the humanitarianism movement.
The UN and aid organisations have warned of devastating food shortages in the war-torn state, calling for a swift international response
How George Clooney and his celebrity friends helped to engineer the birth of a new African country, and then saw it implode