South Sudan famine warning: Living on grass and leaves

Four million people in South Sudan are at risk of famine, according to the United Nations.

The UN is calling on all sides in the country's civil war to grant unrestricted access to aid agencies as they try to prevent the deaths of many children.

Yalda Hakim from the BBC's Our World reports from a village in Kaldak in the remote east of South Sudan to see the impact of the fighting.