>> Turkey's Foreign Minister Mevlut Cavusoglu has told Germany it must learn how to behave if the NATO partners are to maintain relations. That's after two German towns stopped Turkish ministers speaking at meetings of supporters of President Tayyip Erdogan on Thursday.>>

> Cavusoglu saying Turkey will retaliate without hesitation. The row comes amid a souring of relations between the countries.

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On Monday, a German correspondent was arrested in Turkey on charges of propaganda and incitement of hatred. An arrest that Germany says has caused grave damage to ties. With plenty on the line for both sides, with Turkey's referendum and Germany's election coming up later this year, neither side will want to lose face.