The president of the European Council has urged economic migrants not to undertake the arduous journey to Europe.
Donald Tusk appealed to "potential illegal economic migrants" saying: "“Do not come to Europe. Do not believe the smugglers. Do not risk your lives and your money. It is all for nothing.”
He said "Greece is no longer a transit country" and "don't believe the smugglers."
Tusk made the appeal after meeting the Greek Prime Minister Alexis Tsipras.
Tusk is visiting Greece and Turkey to try to secure agreement on reducing the flow of migrants travelling west.
Up to 2,000 migrants and refugees have been arriving in Greece each day.
Tusk pledged support for Greece as it struggles with the huge flow of migrants and refugees crossing into the country.
Around 10,000 people remain camped at the Macedonian border waiting to cross and hundreds are stranded at the port of Piraeus, near Athens.