Gaziantep police on Thursday have detained 17 suspects in two vehicles, reportedly on their way to join ISIS in Syria.
The police have said that three of the suspects are Turkish citizens and 14 are foreign citizens.
While the two of the three Turkish citizens were arrested, one of them was returned to his family.
Ankara has shown its position in the fight against ISIS within the country by being one of the earliest countries that recognized the organization as a terrorist group in October 2013 and identifying and delivering potential foreign fighters seeking to cross the border to Syria to join ISIS despite little cooperation in intelligence sharing from its Western allies.
Police have been carrying out nationwide operations to apprehend suspected militants of the PKK, ISIS and the far-left Revolutionary People's Liberation Party-Front (DHKP-C), all three groups are listed as terrorist groups by Turkey.