North Sudan army, south police clash in Abyei flashpoint
Both sides claim the oil-producing region ahead of southern secession
Anti-graft group warns against 'green resource curse'
Greater transparency is needed in flows of money as demand for land to grow biofuels and for minerals used in electric car batteries increases
Sudan: If the war is over, why is there so much violence?
Washington needs to up the pressure on Khartoum and Juba to make the political compromises necessary to stop the violence
South Sudan death count tops 1,000 after attacks
Southern leaders have accused Khartoum of backing the rebels to disrupt the region and keep control of its oil