2009 Sobat River conflict Part of Sudanese nomadic conflicts Date 12 June 2009 Location near Nasir, South Sudan Belligerents Sudan People's Liberation Army Jikany Nuer tribesmen Strength 27 barges carrying food aid with a 150-man SPLA escort, four other barges Casualties and losses At least 40 soldiers and civilians killed[1] 735 tonnes of food aid looted or destroyed, 11 UN barges missing[1]