The Danish foreign minister expressed openness to working more closely with the U.S. to ensure its interests in the region are addressed after President-elect Donald Trump said he wants to buy the Danish territory of Greenland—but the foreign minister continued to cast doubt on Trump’s idea to acquire the island.

The president-elect said the United States needed the island, which is a semiautonomous part of Denmark, for national security reasons. But there are other possible interests.