The boat carrying migrants, who were attempting to illegally cross into Greece, capsized off Izmir's Karaburun district, said the sources, who spoke on condition of anonymity due to restrictions on talking to the media.
In accordance with the information provided by a migrant woman who was rescued, search and rescue efforts began in the area to find possible missing migrants.
Turkey has been a main route for irregular migrants trying to cross into Europe, especially since 2011, when the Syrian civil war began.