ANKARA—Turkish agents have captured a nephew of U.S.-based Muslim cleric Fethullah Gulen in an overseas operation and have brought him to Turkey where he faces prosecution, Turkey’s state-run news agency said Monday. Selahaddin Gulen, who was wanted in Turkey on charges of membership in a terror organization, was seized in an operation by Turkey’s national spy agency MIT, the Anadolu Agency reported. The report did not say where he was seized or when he was returned to Turkey. Gulen’s nephew, however, was believed to be residing in Kenya. His case is the latest in a series of forced repatriation of people affiliated with Gulen’s movement, which the Turkish government blames for a failed coup attempt in 2016. Gulen, a former ally of Turkish President Recep Tayyip Erdogan who now lives in exile in Pennsylvania, has rejected the accusations of involvement in the coup attempt. Turkey has designated Gulen’s network a …