Nine former employees of the Undersecretariat for the Treasury detained due to their use of a smart phone application known as ByLock, which Turkish authorities say is the top communication tool among the followers of the Gülen movement, on Tuesday.
The detainees were earlier dismissed from their jobs as part of administrative investigation into the movement.
Tens of thousands of civil servants, police officers and businessmen have either been dismissed or arrested for using ByLock.
Turkey experienced a military coup attempt on July 15 that killed over 240 people and wounded more than a thousand others. Immediately after the putsch, the Justice and Development Party (AK Party) government along with President Recep Tayyip Erdoğan pinned the blame on the Gülen movement.
The movement denies any involvement.