US President Donald Trump has pushed to take control of the autonomous Danish island since taking office in January, saying Washington needs to have it for "international security".

"It is a deep mistake to think that this is some extravagant talk from the new American administration. It is nothing of the sort," Putin told an Arctic forum in the northern city of Murmansk.

"We are talking about serious plans on the American side with regard to Greenland. These plans have long-standing historical roots," he added.

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He said that while Russia was not directly involved in the question of Greenland's ownership, Moscow was concerned that "NATO countries, in general, are increasingly designating the far north as a springboard for possible conflicts".

Greenland, which is seeking independence from Denmark, is already home to a US military base, which US Vice President JD Vance is set to visit on Friday.

The island is strategically located between North America and Europe at a time of rising US, Chinese, and Russian interest in the Arctic, where sea lanes have opened up because of climate change.

Denmark has rebuffed Trump's calls to take over the island and says the people of Greenland have shown they do not want to be part of the US.