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Hundreds of thousands of sub-Saharan Africans worked in Col. Gadhafi’sLibya, doing everything from managing hotels to sweeping floors. But some also fought as pro-Gadhafi mercenaries, and many migrant workers have fled ahead of the rebels, fearing they would be mistaken for mercenaries.

Associated Press writers Dalatou Mamane in Niamey, Niger; Slobodan Lekic in Brussels; Frank Jordans in Geneva; Maggie Michael in Cairo; and Karin Laub in Tripoli, Libya, contributed to this report.