The Chief Public Prosecutor's Office in Ankara issued arrest warrants on Wednesday for 47 former teachers, who used to work at schools of Fetullah Terrorist Organization (FETO), according to a judicial source.
The FETO schools where the ex-teachers used to work at had been shut down.
Out of the total suspects being sought, 28 allegedly used ByLock application, an encrypted smartphone messaging application used by coup plotters during July 2016, the source said, who asked not to be named due to restrictions on talking to the media.
Police launched an Ankara-based operation, spanning 12 other provinces, following the warrants; so far, 19 suspects have been arrested.
The search for the rest of the suspects continues, the source added.
The Fetullah Terrorist Organization (FETO) and its U.S.-based leader Fetullah Gulen orchestrated the defeated coup attempt of July 15, 2016, which left 250 people martyred and nearly 2,200 injured.
Ankara also accuses FETO of being behind a long-running campaign to overthrow the state through the infiltration of Turkish institutions, particularly the military, police, and judiciary.