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.

Officials summoned the American ambassador to express its displeasure after the Trump Administration was said be ratcheting up surveillance.

The spying order, known as a “collection emphasis message,” was sent to the heads of U.S. intelligence agencies instructing the use of surveillance satellites, wiretaps, and spies to gather information in Greenland and Denmark,