Turkish police on Sunday detained a brother of the US-based preacher Fethullah Gulen who is accused of masterminding the failed July coup aimed at ousting President Recep Tayyip Erdogan, state media said.

Kutbettin Gulen was detained by police acting on a tip-off at the home of a relative in the Gaziemir district of the western Izmir province, Anadolu news agency said. He is the first of Gulen's siblings to be detained after the coup bid.