Fifteen people in Kahramanmaras province were detained as part of an investigation into the Gulen movement, which the government accuses of leading the July 15, 2016 coup attempt, on Monday.

State-run Anadolu news agency reported that 15 suspects including doctors, students and teachers were rounded up over their alleged use of the ByLock application, which Turkish authorities believe is a communication tool among Gülenists.

Police seized digital materials belonging to the suspects, during raids.

Tens of thousands of people, including civil servants, police officers, soldiers, businessmen and homemakers, have either been dismissed or arrested for using ByLock or having accounts at the now-closed Bank Asya since the failed coup attempt last year.