Fighting in South Sudan’s Upper Nile State is pushing people into famine, according to the United Nations food agency.

The World Food Programme has airdropped food aid to help tens of thousands of people in remote parts of South Sudan where surging conflict has pushed some communities "to the brink of famine".

The United Nations World Food Programme (WFP) began airdropping emergency food assistance to thousands of families in South Sudan's Upper Nile State, where surging conflict since March has forced ...