The ongoing tension between Turkey and the Netherlands only continues to thicken.

Turkish officials say that they will not allow the Dutch Ambassador back in the country. Furthermore, they suspended all high-level diplomatic relations with the Netherlands.

Numan Kurtulmus, deputy Turkish Prime Minister, announced the decision on Monday after the Netherlands blocked Turkish from entering the country. Dutch officials did not allow Turkish Foreign Minister Mevlut Cavusoglu into Rotterdam for a political rally over the weekend.

Dutch officials claim they did not allow Cavusoglu to the rally for security reasons. However, Cavusoglu believes it is because of increased Islamophobia in the Netherlands.

“Why this time am I a terrorist? Are the Turks living in this country terrorists?” he asked. “Is there any single Turkish Turk radicalized? They say no. So, what is the security problem then? They don’t give me any detail.”

Shortly after they refused his admittance into the country, Dutch officials refused another Turkish official’s admittance. Officials did not allow Turkey’s Family Affairs Minister Fatma Betul Sayan Kaya into Turkey’s consulate in Rotterdam. After their refusal, officials escorted her out of the Netherlands.

The two Turkish officials traveled to the Netherlands to attend political rallies in Rotterdam. They were trying to gather the support of 400,000 Turks living in the country to vote ‘yes’ in an upcoming referendum. The referendum is scheduled for April 16, and, if approved, will provide Turkey’s President Recep Tayip Erdoğan with sweeping powers.

He would also be able to remain president for two more terms, marking his presidency from 2014 to 2029. Additionally, it will increase parliamentarians, abolish the prime minister role, give the president a parliament-free cabinet, and enable early elections.

Referendum supporters claim passing the referendum will create a stronger Turkey and resolve internal conflicts. However, critics claim this will create too strong of a power hold for one man.

The European Union claims that if Turks allow the referendum, they might not allow Turkey to be a part of the European Union.

“The proposed amendments, if approved at the referendum of 16 April, and especially their practical implements, will be assessed in light of Turkey’s obligations as an EU candidate country and as a member of the Council of Europe,” EU officials said.

In addition to banning diplomatic relations, Turkey is also threatening to leave its role in the EU-Migrant deal. The deal, created in 2016, would provide Turkey with $6 billion in funding if officials relax immigrant visa rules. If enacted, the European Union will accept one Syrian living in a Turkish camp for each migrant returned to Turkey. Additionally, officials will send anyone who illegally emigrates to Greece back to Turkey.

Furthermore, Erdoğan compared Dutch officials blocking Turkish officials from the Netherlands to Nazism.

Despite Dutch officials warning its citizens in Turkey to “avoid demonstration and be alert,” Cavusoglu said Turkey will not target Dutch civilians.

“We will not harm them because it is not their mistake,” he said. “The Dutch people are friends of Turkey and so many tourists are coming to Turkey…We have been friends for 400 years.”