Turkish prosecutors have issued detention warrants for a total of 48 people in Bursa province as part of an investigation into the Gülen group on Nov 21.
20 of the suspects are accused of having used ByLock mobile app while the remaining are being sought over similar charges.
Turkish authorities believe that ByLock is a communication tool among Gülenists. The gülen group is accused by the Turkish government of masterminding a coup attempt last year. The claim is denied by the members of the group.
Tens of thousands of people, including civil servants, police officers, soldiers, businessmen and homemakers, have either been dismissed or arrested for using ByLock since a failed coup attempt on July 15, 2016.
More than 70,000 people have been arrested and some 220,000 have been detained on coup charges since the failed coup.