Active-duty soldiers are among the suspects, officials in eastern Bitlis province announce
A hunt for another suspect is underway.
The Fetullah Terrorist Organization (FETÖ) and its U.S.-based leader Fetullah Gulen orchestrated the defeated coup of July 15, 2016, which left 251 people martyred and nearly 2,200 injured.
Ankara also accuses FETÖ of being behind a long-running campaign to overthrow the state through the infiltration of Turkish institutions, particularly the military, police, and judiciary.