Denmark Prime Minister Mette Frederiksen said "you cannot spy against an ally" after reports that the U.S. was gathering intelligence on Greenland.

Danish Prime Minister Mette Frederiksen has issued a stern warning to the Trump administration following reports that U.S. intelligence agencies have been ordered to increase surveillance efforts targeting Greenland.

Denmark’s Prime Minister Mette Frederiksen weighed in on the report that the United States has stepped up its spying efforts on Greenland, telling The Associated Press that “you cannot spy against