Police held at least 18 irregular migrants in the northwestern Silivri district of Istanbul, sources said Saturday.
Security teams held the migrants who were on a bus headed to Edirne province, which borders Greece.
The migrants were transferred to the provincial repatriation center.
Turkey has been a key transit point for asylum seekers who want to cross into Europe to start new lives, especially those fleeing war and persecution.
It hosts nearly 4 million refugees, including more than 3.6 million Syrians, the most of any country in the world.
*Writing by Merve Aydogan in Ankara
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