Greece on Thursday rescued 70 migrants at sea, the largest single influx from neighbouring Turkey since a failed coup there last month, authorities said. Refugee and migrant arrivals to Greek islands from Turkey, running into the thousands daily this time a year ago, have largely ebbed after a deal between Ankara and the European Union in March to stem the flow of people, mostly fleeing war and poverty in the Middle East and North Africa. Hundreds of thousands of refugees entered Greece by crossing the narrow sea corridor between Lesbos and the Turkish shores last year.