Turkey has detained a senior aide to the US-based cleric Fethullah Gulen who it blames for the coup attempt aimed at ousting President Recep Tayyip Erdogan, an official said on Saturday.

Security forces detained Hails Hanci in the Black Sea province of Trabzon, the official said, describing Hanci as a "right-hand man" of Gulen and responsible for transferring funds to him. Gulen denies being behind the failed coup.