Famine tragedy must not become a catastrophe, UN chief warns

The United Nations needs €4bn by the end of March to prevent devastating hunger and famine in South Sudan, Nigeria, Somalia and Yemen, yet just €86m has been collected so far, the world body's chief has said.

UN secretary general Antonio Guterres warned "we are facing a tragedy", with more than 20 million people at risk of starvation over the next six months and famine already declared in parts of South Sudan.