Turkish authorities have detained a brother of Fethullah Gülen, a U.S.-based cleric they accuse of orchestrating a coup attempt in July, and issued arrest warrants for 115 other people as part of nationwide investigations into the abortive putsch. Kudbettin Gülen was taken into custody on Sunday by Turkish counter-terrorism police in the Gaziemir district of the Aegean province of Izmir following intelligence that he was staying at a relative’s house, state-run Anadolu Agency said. […] Several of Gülen’s relatives, including a nephew, niece and cousins, have been arrested since the July 15 coup. …