President Recep Tayyip Erdogan on Monday warned the European Union that the Turkish parliament would block laws related to the landmark deal to stem the flow of migrants to Europe if Ankara was not granted its key demand of visa-free travel.

"If that is not what will happen... no decision and no law in the framework of the readmission agreement will come out of the parliament of the Turkish Republic," Erdogan said at the close of the World Humanitarian Summit in Istanbul, amid growing indications Turks will not be given the visa-free travel by the target of the end of this month.