Turkish gendarmerie teams held 24 irregular migrants in the northwestern province of Tekirdag, security sources said on Tuesday.
Acting upon a tip-off, two separate groups of Syrian and Palestinian nationals were held in the villages of Tatlipinar and Malkoclar.
The migrants were transferred to provincial gendarmerie headquarters following health checks in a hospital.
A Turkish national was also held for human smuggling.
Turkey has been a key transit point for asylum seekers aiming to cross into Europe to start new lives, especially those fleeing war and persecution.
Turkey hosts nearly 4 million refugees, more than any other country in the world.
* Writing by Ahmet Gencturk