Deutsche Presse-Agentur July 20, 2017 Thursday 6:34 PM GMT Turkey hits back at Germany's sanctions threat over activist arrests Friederike Heine in Berlin Berlin (dpa) - The Turkish Foreign Ministry has hit back at Germany, accusing Foreign Minister Sigmar Gabriel of "xenophobia" after he warned German citizens they could face arbitrary arrest in Turkey and threatened the country with sanctions. Gabriel's warning came after the recent arrest of six human rights activists in Turkey, including a German national. In retaliation, the Foreign Ministry in Ankara vowed to make "the necessary response" to what it called efforts to score political points at home through "xenophobia against Turkey and Turks." On July 5, Turkish authorities detained six human rights activists - including Idil Eser, director of Amnesty International's Turkey branch, Ali Gharavi of Sweden and Peter Steudtner from Germany - at a conference on digital security in Istanbul. Amnesty says they are accused of supporting an armed terrorist organization without being members. Gabriel warned that any German travelling to Turkey was at risk of arrest and that the country had revised its travel advice to better protect citizens. Gabriel said Steudtner "never wrote about Turkey, he had no contacts in the political establishment ... and never appeared as a critic," and that any Germany national travelling to Turkey could suffer the same fate. Among the diplomatic and economic sanctions being considered by Germany are the withdrawal export guarantees and the reduction of millions of euros in funding to Turkey from the EU, Gabriel said. A statement from the Turkish Foreign Ministry said: "Our relations should not be carried out with extortion and threats, but rather on the basis of internationally recognized norms and principles." It added that Turkey wishes to maintain Germany as an ally. Ibrahim Kalin, a spokesman for Turkish President Recep Tayyip Erdogan, said that law-abiding Germans had nothing to fear in Turkey. He added that by demanding the release of Steudtner, Germany was demonstrating a "lack of respect" and attempting to "give orders" to the Turkish judiciary. Gabriel said that he would work with Chancellor Angela Merkel and European Union officials to decide on diplomatic and economic sanctions against Turkey. In 2016, the German government guaranteed 20.6 billion euros (23.7 billion dollars) worth of exports to Turkey. Total exports to Turkey that year from Germany amounted to 1.2 trillion euros. The EU allocates an average of 600 million euros per year in pre-accession funds to Turkey. Merkel considered new measures against Turkey "necessary and inevitable in light of the development," her spokesman Steffen Seibert said on Twitter. Margaritis Schinas, spokesman for the European Commission, said there would be no withdrawal of EU funds to Turkey without the approval of all of the bloc's member states. "I don't see how we can continue guaranteeing companies' investments in Turkey," Gabriel said, in an apparent reference to Erdogan's decision to blacklist dozens of German companies it suspects of supporting terrorism. Local media reported Thursday that Ankara had suggested swapping German nationals being held in Turkey for Turkish asylum seekers in Germany it suspects of the coup attempt. "There is no official offer of a swap," Gabriel said. "There has been no correspondence and no phone call" in which such a swap was suggested, he added. Germany and Turkey have sparred over a numerous topics in recent months, including the pre-trial detention of a Turkish-German journalist Deniz Yucel and Germany's refusal to extradite asylum seekers Turkey says were involved in a coup attempt last year. Berlin has also been frustrated by Ankara's frequent refusal to let German lawmakers visit soldiers at two air bases, as well as attempts by Turkish politicians to hold campaign rallies in Germany. A decision last year by the Bundestag, Germany's lower house of parliament, to declare the mass killing of Armenians by Ottoman Turks during World War I a genocide sparked outrage in Ankara.