A female judge, identified with initials N.Ş.D., has been arrested in Hakkari province as part of an investigation targeting the Gülen movement, which President Recep Tayyip Erdoğan and the Justice and Development Party (AKP) government accuse of being behind a failed coup attempt on July 15, the CNN Turk news portal reported on Thursday.

The jailed judge is accused of using of a smart phone application known as ByLock, which Turkish authorities say is the top communication tool among the followers of the Gülen movement.

N.Ş.D. was reportedly among the 227 judges who were dismissed by The Supreme Board of Judges and Prosecutors (HSYK) on Feb. 20.

Turkish government accuses the movement of masterminding of the July 15 coup attempt.

Some 4,000 judges and prosecutors have lost their jobs while many of them have been arrested since July 15.