Denmark’s prime minister has told the U.S. during a visit to Greenland that “you cannot annex another country,” even with the argument that international security is at stake.

Danish Prime Minister Mette Frederiksen called Thursday for increased Arctic defense collaboration with the United States during a visit to Greenland, and firmly dismissed the US desire to annex the semi-autonomous Danish territory.

Denmark will not give up Greenland to the US, Danish Prime Minister Mette Frederiksen has said during an official visit to the Arctic Island.Responding to repeated threats from Donald Trump, Frederiksen offered closer collaboration on security but told the US president: "You can't annex other countries.