Twenty-four engineers from the Scientific and Technological Research Council of Turkey (TUBİTAK) were detained on Thursday.
Early on Thursday, police teams carried out simultaneous operations in Kocaeli, İstanbul and Ankara province, and detained 24 engineers as part of an investigation launched by a Kocaeli prosecutor.
All suspects were taken to Kocaeli for interrogation. The detainees are accused of having links to the Gulen movement.
Turkey survived 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 (AKP) government along with President Recep Tayyip Erdoğan pinned the blame on the Gülen movement, and Turkish Islamic scholar.
The movement denies any involvement.