U.N. Secretary-General Ban Ki-moon on Wednesday strongly condemned the commandeering of humanitarian vehicles and the theft of food and other desperately needed aid by government and anti-government forces in violence-torn South Sudan.

The U.N. chief also expressed concern at the rising number of people displaced by the fighting, which surpassed 400,000 this week, and the challenges humanitarian workers are facing in providing life-saving assistance, Nesirky said.

Secretary-General Ban reiterated that those responsible for attacks against civilians, humanitarian workers and U.N. personnel will be held accountable, Nesirky said.

Deputy Secretary-General Jan Eliasson told a U.N. meeting on genocide prevention that the U.N. decision to open its peacekeeping bases in South Sudan, where some 65,000 people have sought refuge, has saved thousands of lives.

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