Denmark summoned the US ambassador in Copenhagen to discuss alleged espionage against Greenland amid a growing push to gain control of the Arctic island.

Danish Foreign Minister Lars Lokke Rasmussen said on Wednesday he would call in the acting U.S. ambassador to Denmark for talks after the Wall Street Journal reported Washington had ordered U.S. intelligence agencies to step up spying on Greenland.

Denmark summoned the top U.S. diplomat in the country for an explanation following a Wall Street Journal report about the United States stepping up its intelligence gathering on Greenland, a semi-autonomous Danish territory coveted by President Donald Trump.