235 police officers including police chiefs have been detained as part of investigations into users of Bylock, the communication application used by Gülenist Terror Group (FETÖ) members during the July 15 failed coup attempt on Wednesday.

Police say that all of the officers have been detained for using the encrypted communication application called Bylock, which is known to be used by members of FETÖ for internal communication.

FETÖ members use this application on their smartphones to share information and communicate with each other.

Testimonies from Gülenists in the bureaucracy detained after the July 15 putsch attempt point out the prevalence of the use of apps. Prosecutors say Bylock was popular among Gülenists for secretive communications between 2013 and 2015, and after 2015, the terror cult turned to Eagle IM, which offers "256-bit end-to-end AES encryption" for its users, according to the description on the app at the Google Play Store.Investigations reveal both those in the lower ranks of FETÖ's infiltrators within state institutions and those in the upper echelons of the bureaucracy perused Bylock.