Russia's FSB security service has identified 2,000 Russian nationals who are relatives of militants in the Middle East and could try to return to Russia, posing a terrorist threat, the FSB's head said on Thursday, the state-run RIA news agency reported.
FSB director Alexander Bortnikov's comments come weeks after an estimated 50 Russian women disappeared after fleeing from a prison camp for the wives and children of Islamic State fighters in northern Syria.
Bortnikov said such people try to reach Russia after leaving conflict areas in the Middle East via humanitarian corridors.
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