By Emma Farge

GENEVA (Reuters) -Tens of thousands of people who have fled the Sudanese city of al-Fashir are unaccounted for, the U.N. refugee agency said on Friday, raising concerns for their safety after reports of rape, killings and other abuses from escapees.

Famine-stricken al-Fashir was the final stronghold of the Sudanese army in the vast, western Darfur region before it fell to the paramilitary Rapid Support Forces on October 26 after an 18-month siege.

People fleeing the city have........

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