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The effort is aimed in part at discouraging migration to Iran, which has ramped up deportations of Afghans.
Neighboring Pakistan has also ordered 1.7 million Afghans it said were living illegally on its territory to leave or face deportation.
Mortaza Behboudi said he endured '10 months of torture', including being nearly choked to death by members of ISIS in jail with him.
Daily news and features from local correspondents covering terrorism, security, and co-operation on the path to greater stability in Afghanistan.