Some 108,000 migrants arrived in Greece in November, roughly half the number recorded the previous month, as worsening weather conditions make crossing the Mediterranean from Turkey even more dangerous, the EU border agency Frontex said. Greece has been a key point of entry for irregular migrants as the European Union struggles with its worst migration crisis since World War Two. Frontex said some 715,000 people arrived in Greek islands in the first 11 months of the year, 16 times the number in the same period the year before, with Syrians dominating among the group, followed by Afghans and Iraqis.