Russia doesn’t “shop” for foreign territories, the Kremlin has said in response to U.S. President Donald Trump’s idea to buy the resource-rich Danish territory of Greenland.

Trump, who built his career as a real estate mogul, has mused openly in recent days about a U.S. purchase of Greenland, raising eyebrows in Europe and the U.S. alike. Greenland, which is gaining attention from world powers including China, Russia and the U.S. because of its strategic location and mineral wealth, is self-governing but underdeveloped and relies on Denmark for economic support.