Disruption to trade routes and food markets as conflict continues in parts of the country is increasing hunger even in unaffected areas.
In a statement issued on Monday World Food Program said about 60 percent of South Sudan is inaccessible by road during rainy season, complicating relief efforts.
It added that South Sudan ranked the eleventh country in the world for child hunger, with ten percent of the population experiencing severe seasonal food insecurity every year for the past five years.
The statement disclosed that the country was making progress against hunger before the conflict and that with over a million people displaced, the conflict is reversing the recent progress made.