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The EU border agency, Frontex, says the number of migrants reaching the Greek islands in April has fallen by ninety-percent compared with the previous month, to less than three thousand. During last year's peak, more arrived on the island of Lesbos in one single day.

Izabella Cooper from Frontex told Carolyn Quinn why the drop was so dramatic.

(Photo: Syrian refugee and baby swim towards the shore. Credit: Reuters)