The bodies of four drowned refugees were found last Friday on a beach on the holiday island of Kos, Greece, after a boat carrying immigrants illegally into the country from nearby Turkey was reported to have sunk.
Victims, including a pregnant woman and a teenage girl, are believed to be Syrians.
The shipping ministry said the bodies were discovered near the northern tip of the Aegean island, and also included another woman and one man.
A coastguard search was launched Thursday after a man who said he was Syrian told authorities he had survived the boat sinking but that 12 other people were on board.
The search came a day after the drowning of another man who was trying to enter Greece in a small boat crammed with refugees.
A coastguard statement said the victim was found unconscious in waters off the eastern Aegean Sea islet of Oinousses early on Thursday, and died shortly later.
Greece is the busiest crossing point for what is described as illegal immigration in the European Union.