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

The Denmark prime minister's comments come a day after the top American diplomat in the country was summoned for an explanation of reports of U.S. intelligence gathering in 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