Danish Prime Minister Mette Frederiksen told The Associated Press “you cannot spy against an ally” after reports that the United States has stepped up intelligence gathering on Greenland, a semi-autonomous Danish territory coveted by U.

Denmark says it will summon 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,

U.S. officials have ordered spy agencies to ramp up efforts to gather intelligence on Greenland, according to two sources with knowledge of the matter, in a sign President Donald Trump apparently remains focused on acquiring the island.