Turkish President Recep Tayyip Erdogan cranked up his fiery condemnation of the Dutch government on Sunday, calling for sanctions against the Netherlands, the behaviour of which he said was evocative of a "banana republic."
Ankara has threatened retaliation against the Dutch government, which banned Foreign Minister Mevlut Cavusoglu from landing ahead of a planned rally on Saturday and sent a second Turkish minister back to Germany after she crossed the border by car to stand in for him.
The ban comes amid rising tensions between Turkey and European countries unwilling to let Turkey campaign on their soil ahead of a referendum that could greatly empower the office of President Erdogan.
At an event in Istanbul on Sunday, Erdogan said the Netherlands would "pay a price" for its behaviour.
Later in the day at a campaign event in eastern Turkey, he called on the international community to impose sanctions on the Netherlands, state-run news agency Anadolu reported.
"I appeal to ... all international organizations who are engaged with the protection of democracy, human rights and the rule of law to raise their voice and also to impose sanctions against the Netherlands," he was quoted as saying.
Erdogan added that the Netherlands had "behaved like a banana republic."
The Turkish government is pushing for a "yes" vote in the April 16 referendum and has been targeting the millions of expatriate voters living in Europe as part of its campaign.
Family Minister Fatma Betul Sayan Kaya crossed the border into the Netherlands from Germany to campaign on Cavusoglu's behalf after his plane was denied landing rights by Dutch officials. Sayan Kaya was however escorted back over the German border by Dutch police.
In a statement released early Sunday on Facebook, Dutch Prime Minister Mark Rutte pointed out that Sayan Kaya had been warned that her planned campaign stop at the Turkish consulate was "unwanted."
Speaking at Istanbul's Ataturk airport upon her return, the minister described her expulsion across the border to Germany as "anti-democratic" and accused the Dutch authorities of suspending "freedom of movement, freedom of speech, every kind of freedom."
Her expulsion prompted a violent protest in Rotterdam overnight to Sunday.
Dutch authorities used water cannon and batons to subdue the subsequent protest, while demonstrators threw rocks and plant pots at officers, Dutch news agency ANP reported, adding that several people had been arrested.
Turkish Finance Minister Naci Agbal told Anadolu that the Netherlands' "anti-democratic" and "fascistic" behaviour showed that Europe was in the process of re-establishing National Socialism.
Speaking in France on Sunday ahead of a planned rally, Cavusoglu threatened to take "wide-ranging steps" against the Netherlands unless the country apologized for its behaviour, Anadolu reported.
But Rutte described the demands for an apology as "bizarre."
Speaking of Cavusoglu, he said: "This is a man who yesterday called us fascists and a land of Nazis. I will work towards a de-escalation, but not by offering an apology."
Denmark also entered the fray on Sunday, with Prime Minister Lars Lokke saying that after "Turkey's latest attack against Holland" he had asked Yildirim to postpone a meeting scheduled for next week.
Also on Sunday, a protester entered the Dutch consulate premises in Istanbul and replaced the country's flag with the Turkish flag, the Dogan news agency reported.
The agency showed a video of the man shouting "Allahu akbar" [God is greatest] before he left the scene. The Dutch flag has since been returned to its original place, the report said.