At least seven people, including two children, have died after a boat carrying migrants from Turkey to a nearby Greek island capsized, Greece’s coast guard has said.
A search and rescue operation off the northern coast of Lesbos recovered the bodies.
The coast guard said 23 people have been rescued.
Reporting on what appeared to be the same sinking, Turkish media said the incident was attended by the Turkish coast guard after a rubber dinghy sank in the Aegean Sea between the Turkish mainland and Lesbos.
Those rescued were taken to a hospital and the search continued, the state-run Anadolu news agency said.
Weather in the area was reported to be good and it was unclear what caused the boat to overturn early on Thursday morning.
There was no immediate information on the total number of people travelling in the boat, their nationalities, or the type of vessel it was.
A sea and land search and rescue operation is continuing, with three coast guard vessels, an air force helicopter, and a nearby boat searching the area for further potential victims.
Greece is one of the main entry points into the European Union for people fleeing conflict and poverty in the Middle East, Africa and Asia, with many making the short but often treacherous journey from the Turkish coast to nearby Greek islands in inflatable dinghies.
Many are unseaworthy or set out in bad weather, and fatal accidents are common.
The Greek government has cracked down with increased patrols at sea and many smuggling rings have shifted their operations south, using larger boats to transport people from the northern coast of Africa to southern Greece.
