Chancellor Angela Merkel today rejected Ankara's accusations that her government had a hand in scrapping Turkish rallies in two German towns backing President Recep Tayyip Erdogan's bid for greater powers.
The rallies around Germany aim to convince the roughly half, of the three million Turks living in Germany, who are eligible to vote in a referendum on 16 April, to support transforming the once largely ceremonial presidential post to the power centre of Turkish politics.
On Friday, the Dutch government said that plans for a similar rally in Rotterdam scheduled for March 11 were "undesirable", Reuters reports.
German Foreign Minister Sigmar Gabriel, who will meet with his Turkish counterpart in Berlin this week, warned against stirring up tensions between the two countries, but also said Berlin would not refrain from criticism where warranted.
Authorities in the German city of Gaggenau had revoked permission for the meeting at short notice, saying there was not enough space for parking vehicles and entrances to the rally.
"We talked about the restrictions on the phone".
After the cancellation by German authorities, Turkey summoned Germany's ambassador in Ankara wanting to know why authorities had cancelled the event.
German authorities in the southwestern town of Gaggenau evacuated the city hall on Friday after receiving a bomb threat, its mayor told German television, one day after he cancelled an event where Turkey's justice minister was to speak.
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The Turkish justice minister also made a statement on the cancellation penning a letter saying: "It is a scandalous decision that violates diplomatic courtesy".
Economy Minister Nihat Zeybekci was due to hold a rally there on Sunday.
"They don't want Turkey to campaign here, they are working for a "No", he said.
Yucel was arrested in mid-February after reporting on the hacking of the private emails of energy minister Berat Albayrak, the son-in-law of Erdogan.
German-Turkish relations have been strained in recent weeks due to the announcement of a referendum by Ankara that would ask the Turkish people if they wanted to abolish the position of prime minister for the first time in Turkish history.
Over 140 journalists are also jailed in Turkey, including Deniz Yucel, a correspondent for Germany's "Die Welt" newspaper.
"This is a very unfortunate decision against democracy and freedoms", Yildirim told a rally in Kirsehir, in central Turkey, on Saturday, according to Turkish news service Anadolu Agency.