German Foreign Minister Sigmar Gabriel told a news conference in Berlin his government had made a decision to take a new direction with its Turkey policy, after its attempts to resolve political disagreements with Ankara failed. "We have to be clearer than before so that those in charge in Ankara understand that such a policy won't be without consequences". Gabriel said that Berlin would also review its support for European Union financial flows to the long-time aspirant to membership of the bloc.
"Merkel: The measures announced by the Foreign Minister against Turkey are necessary and unavoidable", government spokesman Steffen Seibert tweeted.
Turkish pro-coup officers being granted asylum in Germany have also added more strains to the two countries' relations.
The relations started deteriorating rapidly after Turkish officials were not allowed to hold rallies in Germany aimed to shore support for Erdogan's controversial referendum, which would provide more powers to the President.
Turkey in February arrested, on similar charges, German-Turkish journalist Deniz Yucel of Die Welt daily and is holding several other German citizens.
Germany's DIHK chambers of commerce said that in the current environment investing in Turkey was hard to imagine.
Germany was Turkey's top export destination in 2016, buying US$14 billion worth of Turkish exports, according to International Monetary Fund direction of trade statistics. So far this year, bookings from Germany have accounted for about 10 percent of Turkey's tourists.
The spokesman stressed that Turkey wants to maintain relations with Germany "which are at a good level now".
Germany's foreign minister says his country will revise its travel advice for Turkey following the jailing of a German human rights activist who has no ties to the country.
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The governor has also had meetings with Germany's top environmental official, as well as with China's President Xi Jinping.
"Certainly we couldn't have accepted the deal", Germany's foreign ministry said.
Cavusoglu said: "they request that (German citizens) be released at one, they even give a time-frame.in other words, they make requests that snub the independence of the judiciary".
On Tuesday, local media reported that a Turkish court had ruled that Peter Steudtner, a German human rights activist, among six human rights activists, including Amnesty International's Turkey director Idil Eser, should remain in custody.
Last year, the number of foreign visitors to Turkey fell to 25.4 million amid a spate of bombings by Kurdish and Islamist militants, the lowest in nine years.
Mehtap Yoruk used to teach in a nursery school in south-east Turkey, until she was sacked a year ago in a purge of tens of thousands of state employees.
"I therefore cannot see how we, as the government, can still guarantee corporate investments in Turkey when we are seeing arbitrary, politically-motivated confiscations [of property] there and arbitrary deportations for political reasons", he underlined. Turkey denied the report.
They included chemicals manufacturer BASF, which confirmed it was on a list that had been passed to it by German police, but declined to comment on the allegations.
Council of Europe's Secretary General Thorbjorn Jagland said Thursday he told Turkey's Binali Yildirim that "human rights defenders should be able to fulfil their activities freely without being subject to arbitrary interferences by the authorities". Such guarantees are offered to insure exports to many countries.