South Sudan: Women raped under the noses of UN forces
10 June 2014 Last updated at 08:02 BST
A four-day international summit is taking place in London looking at issues sexual violence in conflict zones.
In South Sudan, investigators believe sexual violence is happening on a scale not seen before in the country.
The allegations are extremely hard to verify in the world's newest state, and claims of rape have been levelled at both government soldiers and rebel forces.
Thousands of South Sudanese now live in camps after a political dispute turned into a civil war.
But even here, under UN protection, women are not safe.
Karen Allen reports from a UN camp in South Sudan's capital, Juba.