Ten migrants, including five children, drowned when their boat sank Saturday in the Aegean Sea as they were trying to reach Europe.
Turkish news agency Dogan said 43 people were rescued.
The Turkish coast guard is looking for more survivors from the boat that set off from Turkey’s western coast on its way to the Greek island of Lesbos.
One survivor told the French news agency, AFP, that “at least 20 friends are still missing.”
Syrians and Afghans were among those on the capsized boat.
The winter cold and harsh water conditions have not stopped the human wave of migrants seeking refuge in Europe.
Turkey struck a deal with the European Union last November to slow the flow of migrants in return for more than $3 billion in financial assistance.
Many of the migrants, looking for a better life, are escaping war and poverty in Middle Eastern and African countries.