Seventy-three teachers, who were earlier dismissed from their jobs, were detained in an Istanbul-based investigation into the Gulen movement, which the government accuses of masterminding the July 15, 2016 coup attempt, on Tuesday.
Istanbul police carried out operations to detain the suspects over their use of ByLock, a controversial mobile application that the government claim to be the top communication tool among the members of the movement.
The detainees include 29 female teachers.
According to media, police were able to detain 73 teachers as of Tuesday evening while operations were underway to catch 25 others. Two teachers were earlier arrested over similar charges as part of another investigation.
Turkish government has detained more than 120,000 people including thousands of teachers and academics in its crackdown against the movement since last summer.