NATO is talking about improved Arctic security, says the alliance's secretary general. Some of those talks reportedly involve a European troop presence in Greenland. It's a remarkable turnaround for an alliance that has until recently tried to ignore the region.

The European Union can help provide security for Greenland, should Denmark request it, the European Commissioner for Defence and Space said, warning that a U.S. military takeover of the island would be the end of NATO.

The Trump administration has repeatedly said the U.S. should be in control of Greenland, which is part of Denmark and NATO.

European defence chief says any US seizure of Greenland would shatter NATO and devastate transatlantic relations.

Denmark’s Prime Minister Mette Frederiksen has issued one of her strongest public warnings yet. This comes after US President Donald Trump renewed his controversial claims over Greenland. Frederiksen’s message was clear and serious.

The senator's comments come after President Donald Trump said the U.S. would "do something on Greenland, whether they like it or not."

Trump’s threat to annex an autonomous part of Denmark has plunged NATO into an unprecedented situation: An alliance based on collective defense now faces the prospect that one member might attack another.

Top Trump aide Stephen Miller says it's the "formal position" of the White House that Denmark's territory of Greenland "should be part of the U.S."

German Foreign Minister Johann Wadephul said on Monday that NATO allies had to work together for security, and said Greenland and Denmark should decide the future of the island, which U.S. President Donald Trump says should belong to the United States.

Italian Prime Minister Giorgia Meloni said she did not believe the United States would use military force to seize Greenland, warning on ​Friday that such a move would have grave consequences for NATO.