Italy has threatened to stop vessels of other countries from bringing migrants to its ports.
The warning came as Italy's EU representative, Maurizio Massari, warned in a letter to the bloc the situation had become "unsustainable".
Prime Minister Paolo Gentiloni has accused other European nations of "looking the other way".
An estimated 10,000 people are believed to have attempted the journey from North Africa in the past four days.
More than 73,000 migrants have landed in Italy this year, an increase of 14% on the same period last year.
Some 2,000 have died or are missing feared drowned, the UN's refugee agency says, the vast majority attempting the crossing from Libya.
Libya is a gateway to Europe for migrants from across sub-Saharan Africa and also from the Arabian peninsula, Egypt, Syria and Bangladesh. Many are fleeing war, poverty or persecution.
Sources : ceylontoday
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