Turkey's National Intelligence Organization (MİT) sent a report listing the names of those in the Turkish Armed Forces who use the ByLock application to the Istanbul Office of the Prosecutor on Thursday.
The prosecutor has announced that 243 Turkish Armed Forces personnel will be taken into custody across 54 provinces. So far, 95 Turkish Armed Forces personnel have been detained.
The operation is being conducted by five separate branch offices within the Istanbul Security Directorate.
As a result of a court decision, the addresses registered to the suspects were searched.
Eight colonels and three lieutenant colonels are among the suspects.
ByLock is an encrypted messaging application used by members of the Fetullah Terrorist Organization (FETÖ). Turkish security agencies cracked the application, and FETÖ suspects are continuing to be identified.
FETÖ terrorists are led by U.S.-based Fetullah Gülen, who orchestrated Turkey's July 15 coup plot and is the mastermind behind a long-running campaign to overthrow the state through the infiltration of Turkish institutions, particularly the military, police and judiciary.