Hundreds of migrants already are staying in makeshift camps along the border with almost no facilitie
More than 10,000 migrants bound for Europe have died or gone missing in the Mediterranean since 2014
Coastguard spokesman said it appeared many people had left the Libyan coast trying to make the perilous voyage across the sea to Europe
Europe's migrant crisis is just one part of a growing tide of human misery led by Palestinians, Syrians and Afghans
It was the second migrant vessel found in that area of the southern Aegean Sea since last week
Roughly 25 meter vessel, which resembled a large fishing boat, had been carrying an undetermined number of people
A passing ship spotted the sinking vessel about 75 nautical miles south of Crete, Greece's largest island, in the southern Aegean Sea
There have been growing concerns that Turkish nationals will not be given visa-free travel by the end of June, the target date
Said it was unhappy with leaving the solution to the crisis in the hands of a country outside the EU
In April, acting Spanish Prime Minister Mariano Rajoy faced heavy criticism from lawmakers over the fact that Spain had taken in only 16 asylum-seekers under an EU relocation plan, out of a promised 16,000
The visit comes amid questions over the legality of the EU-Turkey pact, which deports back to Turkey migrants who do not qualify for asylum in Greece
It would be the worst humanitarian calamity in Europe's migrant crisis since more than 800 people died last April near Libyan shores
Two Turkish leisure vessels on Lesbos and another one on Chios are waiting to pick up the migrants
Greece is at the heart of Europe's greatest migration crisis since World War II
The leaders will also try to persuade Turkey's prime minister to slow the flow of migrants travelling to Europe
The bottleneck is expected to get worse after EU members Slovenia and Croatia, as well as Serbia and Macedonia, imposed a limit of 580 migrants entering their borders each day
Greece, the main landing point for most migrants arriving in Europe, faces huge pressure to stop 'waving through' migrants to the rest of the EU
UN High Commissioner also warned against European countries closing their borders which would de-facto block many refugees