Germany should unilaterally provide aid to Turkey for refugees to help slow the flow across the Aegean Sea to Greece if the EU fails to reach a common deal with Ankara on the issue, Vice Chancellor Sigmar Gabriel said on Thursday. Gabriel's comments highlight frustrations in Berlin with the EU's discordant response to the refugee crisis, which has already seen hundreds of thousands pour into Germany this year, straining both local authorities and the coalition government. "If the Europeans can only do it in a limited way, I consider it sensible for Germany to make an advance or pay on its own," Gabriel told a gathering of his Social Democrats, junior partners in Chancellor Angela Merkel's right-left coalition.