The Greek coastguard say two boats carrying migrants have capsized in the Aegean Sea. At least 22 people have drowned and another seven are missing. Thirty-six survivors have been rescued from the sea and the search is continuing, officials say. Greece is a major entry point for migrants and refugees trying to reach the European Union. Many cross by sea from Turkey, and accidents are frequent. Correspondents say there has been a sharp increase in sea-borne refugee traffic over the past year because of stricter controls on the Greek-Turkish land border to the north and the ongoing war in Syria. The two vessels foundered about four nautical miles off the Greek island of Samos, close to the Turkish coast, on Monday, according to officials. Authorities say they do not yet know the nationality of the migrants, and the circumstances of the incident are unclear.