Greenland’s prime minister made a statement on Wednesday asserting that Greenland belongs to them and is not available for purchase. This statement was in response to a comment made by U.S. President Donald Trump, who mentioned that his administration backed Greenland’s right to self-governance, but also stated that the United States would acquire the territory by any means necessary.

Greenlandic Prime Minister Múte Bourup Egede said the island’s citizens are neither American nor Danish because they are Greenlandic.

The United States needs to understand that, he wrote in a post in Greenlandic and Danish on Facebook Wednesday.

The future of Greenland will be decided by its people, he wrote.

His post came hours after Trump made a direct appeal to Greenlanders in a speech to Congress on Tuesday, a week before islanders head to the polls for parliamentary elections.

“We strongly support your right to determine your own future, and if you choose, we welcome you into the United States of America,” Trump said.

“We will keep you safe. We will make you rich. And together we will take Greenland to heights like you have never thought possible before,” he added.

But Trump also said his administration was “working with everybody involved to try to get it,” referring to his wishes to acquire Greenland from Denmark, a longtime U.S. ally.

“We need it really for international world security. And I think we’re going to get it. One way or the other, we’re going to get it,” Trump said.

Many in Greenland, a vast and mineral-rich island that is a semiautonomous territory of Denmark, are worried and offended by Trump’s threats to seize control of their homeland.

Asked about Trump’s comments, Denmark’s foreign minister said Wednesday he did not think Greenlanders wanted to separate from Denmark in order to instead become “an integrated part of America.”

Lars Løkke Rasmussen sought to strike an optimistic tone, saying he believed that Trump’s reference to respecting Greenlanders’ right to self-determination was “the most important part of that speech.”

“I’m very optimistic about what will be a Greenlandic decision about this. They want to loosen their ties to Denmark, we’re working on that, to have a more equal relationship,” the minister said during a trip to Finland.

Løkke added that it was important that next week’s parliamentary elections are free and fair “without any kind of international intervention.”

Greenlanders will head to the polls Tuesday.

Trump’s recent comments about taking over the island have ignited unprecedented interest in full independence from Denmark, which has become a key issue during campaign season.