At least 35 people in Adana province were detained as part of an investigation into the Gulen movement, which the government accuses of masterminding the July 15, 2016 coup attempt, on Tuesday.
The detainees included several women with one of them, identified as B.R.K. being 8.5-months pregnant.
Detainees are accused of using ByLock, a controversial mobile app that Turkish authorities believe to be the top communication tool among the followers of the movement. Tens of thousands of civil servants, police officers and businessmen have either been dismissed or arrested for using ByLock since the abortive coup. The Gulen group denies involvement in it.
Media later in the day reported that B.R.K., a public servant at the Directorate General of Meat and Milk Board, was released after his interrogation.