Amnesty International says that Sudan's indiscriminate bombing of rebellious South Kordofan province is stoking a developing crisis by displacing thousands of people and disrupting crop planting. The human rights group says the situation is likely to get worse as food supplies dwindle and the rainy season cuts off roads, making relief missions impossible.

Amnesty International is urging the U.N. Security Council and African Union to take immediate steps to make Sudan halt the indiscriminate attacks and bring pressure to urgently open conflict-affected areas to humanitarian relief.

South Kordofan borders the new nation of South Sudan, which peacefully broke away from Sudan in 2011. Many of South Kordofan's 1.1 million people are sympathetic to South Sudan and are in territory controlled by the rebel Sudan People's Liberation Army-North.