Belgrade - Greek authorities are searching by air and sea for a boat with about 60 migrants on board that issued a distress signal off an eastern Aegean Sea island.
The coast guard said on Wednesday the vessel was reported as being east of the main port of Rhodes.
Hundreds of people still reach the Greek islands every week from Turkey in smugglers' boats. That's despite an abrupt drop in arrivals after Balkan and other European nations closed their borders and a March deal between the European Union and Turkey to stem the westward migration flow of refugees.
About 58 000 migrants and refugees are now trapped in Greece.
Also on Wednesday, unknown arsonists set fire to a central Athens building used to house dozens of refugees and other migrants. The attack caused damages but no injuries.