14 Turkish judiciary members remanded over coup bid
The remaining 17 suspects are being interrogated, sources added.
Ankara has repeatedly said the July 15 coup attempt was organized by followers of U.S.-based preacher Fetullah Gulen and his FETO group.
Gulen is also accused of leading a long-running campaign to overthrow the Turkish government through the infiltration of state institutions, particularly the military, police and judiciary, forming what is commonly known as the parallel state.
Approximately 13,000 members of the military, police, judiciary, as well as civil servants, have been so far detained and 6,000 remanded to custody for alleged links to the terrorist group.
Tens of thousands of suspected Gulenists have been removed from their posts.