France has said the European Union will not allow other nations to attack its "sovereign borders", after US President-Elect Donald Trump refused to rule out using military force to seize Greenland.
On Tuesday, Trump reiterated his desire to acquire the autonomous Danish territory, saying it was "critical" for national and economic security.
French Foreign Minister Jean-Noël Barrot told French radio "there is obviously no question that the European Union would let other nations of the world attack its sovereign borders, whoever they are".
Barrot said he did not believe the US was going to invade the vast Arctic island, but he was clear the EU should not let itself be intimidated.
Trump has repeatedly expressed an interest in buying Greenland, having mooted the idea during his first term as president.
Denmark, a long-time US ally, has made clear that Greenland is not for sale and that it belongs to its inhabitants.
Greenland's prime minister, Mute Egede, is pushing for independence and has also made clear the territory is not for sale. He was visiting Copenhagen on Wednesday.
Trump made the remarks at a free-wheeling news conference at his Mar-a-Lago estate in Florida, less than two weeks before he is sworn in for his second term as president.
Asked if he would rule out using military or economic force in order to take over Greenland or the Panama Canal, Trump said: "No, I can't assure you on either of those two.
"But I can say this, we need them for economic security."