Copenhagen, Denmark — Denmark's foreign minister had the top U.S. diplomat in the country summoned for talks after the main national public broadcaster reported Wednesday that at least three people with connections to President Trump have been carrying out covert influence operations in Greenland.

Greenland, a huge semi-autonomous Danish territory in the Arctic, is coveted by Mr. Trump, who has called repeatedly for the vast land mass to be annexed by the United States. Denmark and Greenland insist that the mineral-rich island is not for sale, while Mr. Trump has not ruled out taking it by military force even though Denmark is a NATO ally.

Greenland is located to the northeast of Canada. The Danish territory has its own elected government. Its location between the U.S., Russia and

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