Twenty teachers were detained in an Adana-based investigation into the Gulen movement, which the government accuses of masterminding the July 15, 2016 coup attempt, on Friday.
The detainees are accused of using ByLock mobile application.
Turkish prosecutors claim that Bylock is the top communication tool among the members of Gülen Movement, which the government accuses of mastermind the July 15 coup attempt. Thousand has so far been jailed for using the application.
According to media, the detainees included five female teachers.
Turkish government has detained more than 120,000 people including thousands of teachers and academics in its crackdown against the movement since last summer.