More than 1 million people have fled Sudan to neighboring states and people inside the country are running out of food and dying due to lack of health care after four months of war, the United Nations warned on Tuesday.

Fighting between the Sudanese army and the paramilitary Rapid Support Forces (RSF) has devastated the capital Khartoum and sparked ethnically driven attacks in Darfur, threatening to plunge Sudan into a protracted civil war and destabilize the region.

"Time is running out for farmers to plant the crops that will feed them and their neighbors. Medical supplies are scarce. The situation is spiraling out of control," U.N. agencies said in a joint statement.