Twenty-four out of 41 people who were detained in operations on March 7 have been arrested over alleged links to the Gülen group, which is accused by the Turkish government of masterminding a coup attempt on July 15, 2016.
Işık Publications, which was closed down in the aftermath of the failed coup, used to publish religious books and books penned by Turkish-Islamic cleric Fethullah Gülen.
The detentions of Işık employees were part of an İstanbul-based operation conducted across four provinces. Thirteen of the employees have been released on judicial probation, while four of them were released pending trial by an İstanbul court.
The military coup attempt killed 249 people and wounded more than a thousand others. Immediately after the putsch the ruling Justice and Development Party (AKP) government along with President Recep Tayyip Erdoğan pinned the blame on the Gülen group.
The group denies any involvement.
Turkish Interior Minister Süleyman Soylu on Jan. 5 said 48,305 people were jailed in 2017 alone over Gülen links.
Soylu said on Dec. 12 that 55,665 people have been jailed and 234,419 passports have been revoked as part of investigations into the movement since the failed coup.