A Sivas prosecutor has issued detention warrants for 13 dentists in 7 provinces as part of an investigation into the Gulen movement, according to the state-run Anadolu news agency.

Police in Sivas, Hatay, Bursa, Bayburt, Giresun, Osmaniye and Edirne carried out operations and detained 12 dentists. One more dentist is being sought over same charges.

The suspects are accused of having used ByLock, a controversial mobile application that prosecutors claim to be the top communication tool among the followers of the Gulen movement.

The government accuses the movement of masterminding the July 15, 2016 failed coup attempt while the latter denies any involvement. The government detained more than 120,000 and put some 50,000 in pre-trial detention over alleged or real ties to the movement since last July.

Tens of thousands of civil servants, police officers and businessmen have either been dismissed or arrested for using ByLock so far.