The UN's World Food Programme (WFP) warns that more than one million vulnerable people in South Sudan could lose food and nutrition aid by October unless new funding is found, with stocks at its Malakal hub in Upper Nile state falling from 10,000 tonnes a year ago to under 300. The shortfall comes as about 3,000 refugees and returnees cross each week from war-torn Sudan, adding to a country where 7.8 million people, over half the population, already face acute food shortages and 2.2 million children are acutely malnourished. WFP says it faces an immediate $86m gap and a $416m shortfall over six months, and also cites illegal checkpoints as an obstacle to reaching people in need.