Greenland's Prime ​Minister Jens-Frederik ⁠Nielsen said on Wednesday there were ​red lines that could not be crossed in discussions with the United States, but added that more needed to be done to boost security in the region.

⁠Nielsen and Denmark's Prime Minister Mette Frederiksen were in ‌Paris to meet French President Emmanuel Macron to shore ​up support over U.S. President Donald Trump's push to take over the self-governing Arctic island, which has ‌been Danish territory for centuries.

Talks between Greenland, Denmark and the United States are due to take place to try to find a solution to the crisis, but Nielsen said Greenland had some red lines that could not be crossed even ‍if he hoped to come to some sort of agreement, without elaborating.

"We are under pressure, serious pressure. We are trying to push back from the outside. We are trying to handle our people who are afraid, scared," he said in a joint conversation with Frederiksen at Sciences Po University.

But he also said: "We need to do more surveillance and security in our region because of the way ‍Russia acts now."

Russia says talk of Moscow being a threat to Greenland is a myth to whip up hysteria.

Europe must stick together, Frederiksen says

The U.S. demand for control of Greenland has shaken transatlantic relations and accelerated European efforts to reduce dependence on the United States, even as Trump last week withdrew tariff threats and ruled out taking Greenland by force.

Frederiksen said that what the crisis had shown was that the majority of Europeans ‍were on the same page and had been ‍able to unite to push back on Trump's demands, ‍notably his threat of additional tariffs on European states.

Saying the world order had changed ‍forever and questioning what may happen in ⁠Washington in the future, she said it was vital for Europe to become stronger, but also urged transatlantic unity given that it was clear Russia did not ​want peace.

"If we allow Russia to win in Ukraine, they will continue," she said. "The best way forward for the United States, Europe is to stick together."

The diplomatic rift between Denmark and the United States, both founding members of NATO, had seemed in recent weeks to threaten the future of the military alliance, ‌although the conflict has since been moved to a diplomatic track.