At least 23 people were killed on Saturday in the wrecks of two boats carrying illegal migrants, one off the coast of Turkey and the other near the Greek island of Paxi.
At least 11 people, including eight children, died in the sinking of a boat off the coast of Turkey, state news agency Anadolu said.
The boat sank in the Aegean Sea near Cesme, a seaside resort in western Turkey, located in front of the Greek island of Chios, the agency said, adding that eight people had been rescued.
The nationality of the victims was not yet known.
This wreck occurred hours after another ship was also carrying immigrants in the Ionian Sea near the Greek island of Paxi, which left at least 12 people dead.
Turkey, which receives about four million migrants and refugees, the vast majority of them Syrians, is an important crossing point for those fleeing conflict and seeking to reach Europe, most of them via Greece.
A migration agreement concluded in March 2016 between Ankara, the capital of Turkey, and the European Union to control Aegean Sea crossings considerably reduced arrivals on the country's five nearest islands.