[Refugees and migrants line up for a food distribution at the Moria refugee camp on the Greek island of Lesbos]More than 460 migrants and refugees arrived on Greek islands from Turkey on Tuesday, the highest in several weeks, despite a European Union deal with Ankara agreed in March to close off that route. Under the accord, those who cross to Greece without documents from March 20 will be sent back to Turkey unless they apply for asylum and their claim is accepted.