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Foreigners captured whilst investigating debris from recent fighting between Sudan and South Sudan in the Heglig oilfield area on April 28, 2012, are escorted off an airplane by Sudanese soldiers in Khartoum. The foreigners identified as a British, a Norwegian, a South African and a South Sudanese were flown to Khartoum for "more investigation", according to an army spokesman. AFP PHOTO / ASHRAF SHAZLY (Photo credit should read ASHRAF SHAZLY/AFP/GettyImages)