An outbreak of Hepatitis E disease in the 'Protection of Civilians' site in the UN base in Bentiu the capital of South Sudan's Unity state has killed three people out of nine total cases, UNICEF said.

The spread of Hepatitis E is linked to contamination of fecal matter usually in drinking water, according to the World Health Organization.

UNICEF said in a weekly situation report, linked below for download, that preventing spread of the outbreak will require provision of more safe drinking water in the base and better hand washing practices with soap.

The report said there are over 115,000 displaced people reported living inside the Bentiu UN base, but only ten operational boreholes. That means each person has access to only 10 liters of water available per person per day, below the international humanitarian standard of 15 liters per day.

The group said a new borehole is being drilled alongside construction of a new water distribution network expected to be completed within two weeks.

Meanwhile, UNICEF said 11 children under five died in the Bentiu site over the last week, down from a high of 16 deaths two weeks ago. Though below the emergency threshold, this number remains "elevated."

The humanitarian organisation said these deaths are mostly from malnutrition.