Danish Prime Minister Mette Frederiksen strongly criticized alleged U.S. influence operations in Greenland, calling them “unacceptable” interference in Denmark’s internal affairs and Greenlandic democracy.

Her remarks followed a Danish broadcaster DR report claiming that at least three U.S. citizens linked to President Donald Trump were engaged in covert activities in Greenland. These reportedly included building private networks and compiling lists of local leaders based on their stance toward U.S. control of the Arctic island.

“We have a very clear disagreement when it comes to Greenland. Any interference in the internal affairs of the Kingdom of Denmark, and in Greenlandic democracy, is unacceptable,” Frederiksen said, stressing her government is taking the issue “very seriously.”

She also noted that Washington has not clearly denied the reports. “I take note that the Americans have not explicitly rejected what has been reported today. That is, of course, serious,” she added.

Frederiksen raised the issue with U.S. senators during a meeting also attended by Greenland’s Foreign Minister Vivian Motzfeldt. Denmark’s Foreign Minister Lars Lokke Rasmussen later summoned the U.S. charge d’affaires for talks.

The controversy comes after President Trump repeatedly expressed interest in Greenland, even suggesting military or economic measures to secure U.S. influence over the island. Danish intelligence services have warned that Greenland is increasingly targeted by influence campaigns designed to fuel tensions between Copenhagen and Nuuk.

Greenland, a former Danish colony, became part of the Kingdom of Denmark in 1953. It was granted home rule in 1979, while Denmark retained responsibility for defence and foreign policy.