Ankara has also accused Gulen of orchestrating a failed coup in July, a charge the cleric denies, Reuters reports.

Read alsoU.S. suspends diplomatic mission to Turkey in wake of Russian envoy murderAs UNIAN reported earlier, Russian Ambassador in Turkey Andrei Karlov was gunned down at a photo exhibition by a Turkish police officer who shot at the envoy multiple times, shouting "We die in Aleppo, you die here!"