The summer surge in 2015 overwhelmed immigration officers.
Nearly 400 people have drowned trying to cross from Turkey to Greece by boat this year.
About 500 people were on board two sinking ships.
Weekly arrivals of 5,000 migrants are putting Greece under enormous strain.
Fleeing persecution, Rohingya migrants are being kept at sea by countries that don't want them.
More people have drowned in the Mediterranean this year than in the Titanic disaster.
The leader of the National Front on the U.S. immigration system and Europe's migrant crisis.
EU leaders agree to triple naval search mission in Mediterranean following drowning of 900 people in past week.
Even as more migrants are crossing, the sea route from war-torn Africa is getting more deadly.
Unmanned aircraft could be used to spot migrants boats in trouble, helping to stop further tragedies.
The North African migrants were on seven vessels which were rescued in a single day this week, Italian and Tunisian authorities said on Wednesday.
Good weather has encouraged migrants to make the perilous journey across the Mediterranean Sea.
A distress signal was sent from the boat
Nearly 350,000 fled war and conflict by sea in 2014, the UN Human Rights Agency said Wednesday.