Police in Turkey’s central Anatolian province of Niğde arrested 24 teachers who were found to be using ByLock, a smartphone messaging application or what Turkish prosecutors calls the top communication tool among the members of Gulen Movement, on Sunday.

Those arrested had been earlier detained along with 3 others by Turkish police as part of an investigation into the Gulen Movement.

Turkey survived a military coup attempt on July 15 which killed some 240 people and wounded a thousand others. While the government accuses the Gülen movement of masterminding the putsch, the movement has repeatedly repudiated such claims, condemning any intervention into democratically-elected administrations.

A total of 81,494 people have been purged from state bodies, 40,029 detained and 20,355 arrested since the coup attempt. Arrestees included journalists, judges, prosecutors, police and military officers, academics, governors and even a comedian.