The number of South Sudanese civilians sheltering in United Nations bases has risen above 150,000 for the first time in 18 months of civil war, the UN has said.
A total of 153,769 civilians are now seeking safety behind the barbed wire of six peacekeeping bases of the UN Mission in South Sudan (UNMISS).
Many fled into the camps as war broke out in December 2013 and have never left.
But tens of thousands more have entered the bases during an upsurge in fighting since April, taking those seeking shelter to the highest number yet.
Over 10,000 have arrived in the past week alone, according to official figures released by UNMISS.
Over 28,000 are based in the capital Juba.
Aid workers there are trying to stamp out a cholera outbreak that has killed at least 32 people since cases were first recorded last month, including inside the UN base.
Another 91,500 are sheltering in Bentiu, capital of the northern battleground state of Unity, where a UN report last month described how South Sudan's army raped then burned girls alive inside their homes during a recent campaign marked by "new brutality and intensity".
More than 30,000 are also in the UN base in Malakal, capital of the northeastern Upper Nile state.
The town has been left in ruins by intense fighting, swapping hands several times.
Government forces retook it again yesterday after around a week under rebel control during which gunmen fired on the civilians inside the UN base.
UNMISS said that attack may constitute a war crime.
On Thursday, the world's youngest nation marks its fourth year since winning independence from north Sudan.
The UN has listed South Sudan as "lower in terms of human development than just about every other place on earth".
Civil war began when President Salva Kiir accused his former deputy Riek Machar of planning a coup.
That set off a cycle of retaliatory killings across the country that has split the poverty-stricken, landlocked country along ethnic lines.
