US President Donald Trump said on Tuesday that he would be putting off a planned meeting with Denmark’s prime minister because she did not want to talk about a possible US purchase of the island of Greenland.

Taking to Twitter, Trump said, “Denmark is a very special country with incredible people but based on Prime Minister Mette Frederiksen’s comments, that she would have no interest in discussing the purchase of Greenland, I will be postponing our meeting scheduled in two weeks for another time”.

“The Prime Minister was able to save a great deal of expense and effort for both the United States and Denmark by being so direct. I thank her for that and look forward to rescheduling sometime in the future!” Trump posted.

Last week, Donald Trump had expressed his interest in buying the world’s biggest island.

In response to Trump, Greenland government said in a statement that, “Greenland is not for sale, and can’t be sold, but Greenland is ready for negotiations to enter collaborations with other countries, including the US”.

Trump had been scheduled to make a state visit to Denmark on Sept. 2 on the invitation of Queen Margrethe II.

Earlier on Sunday, Larry Kudlow, head of the National Economic Council, said Greenland is a “strategic place” rich in valuable minerals and that discussions are continuing.

“The president, who knows a thing or two about buying real estate, wants to take a look at a potential Greenland purchase”, Kudlow added.

However serious White House discussions of a sale might have been, the topic prompted jokes on both sides of the Atlantic since Trump’s interest was first reported. He got into the act on Monday night with a tweet showing an image of a golden Trump tower on an austere Greenland landscape. “I promise not to do this to Greenland,” Trump wrote.