US president Donald Trump has refused to rule out military action to seize Greenland, hours after an explosive text sent to Norway's prime minister was leaked.
Speaking in a phone interview with NBC News, the president was asked if he would use force to seize Greenland.
"No comment," he replied.
READ MORE: Explosive text exchange between Donald Trump and Norway's PM
He doubled down on his claims that the Norwegian government played a hand in him not winning the Nobel Peace Prize this year.
"Norway totally controls it despite what they say," he said.
"They like to say they have nothing to do with it, but they have everything to do with it."
READ MORE: Europe mulls retaliation over Trump's Greenland tariffs
His comments come after a text sent to Norway's Prime Minister Jonas Gahr Store went public.
"Dear Jonas: Considering your Country decided not to give me the Nobel Peace Prize for having stopped 8 Wars PLUS, I no longer feel an obligation to think purely of Peace, although it will always be predominant, but can now think about what is good and proper for the United States of America," Trump wrote to Store.
The Nobel Peace Prize is awarded by a committee appointed by the Norwegian Parliament.
READ MORE: Trump administration investigating Minnesota politicians
The five member panel includes three politicians from different parties, a foreign policy scholar and a nonprofit leader.
"Denmark cannot protect that land from Russia or China, and why do they have a 'right of ownership' anyway?
"There are no written documents, it's only that a boat landed there hundreds of years ago, but we had boats landing there, also."
Denmark started its colonisation of Greenland in 1721, decades before the United States existed as a country.
READ MORE: 'Gold-standard' study rejects Trump's claims on paracetamol
"I have done more for NATO than any other person since its founding, and now, NATO should do something for the United States," the president wrote to Store.
"The World is not secure unless we have Complete and Total Control of Greenland."
The president is amping up his rhetoric in his ambitions for the massive island in the Atlantic, which has for centuries been a territory of Denmark.
Over the weekend Trump placed additional tariffs on eight European countries that opposed his plans to annex Greenland.
The ten per cent tariffs were placed on Denmark, Norway, Sweden, France, Germany, the United Kingdom, the Netherlands and Finland.
Denmark has responded to America's threats by sending more troops to Greenland.
About 200 Danish soldiers have landed in the towns of Nuuk and Kangerlussuaq.
Polling showed that Americans were overwhelmingly opposed to annexing Greenland.
A Reuters poll found just 17 per cent of Americans approved of his efforts to take Greenland.
Just 10 per cent approved of "using military force to obtain new territory".
READ MORE: Donald Trump loses the support of his most influential backer
DOWNLOAD THE 9NEWS APP: Stay across all the latest in breaking news, sport, politics and the weather via our news app and get notifications sent straight to your smartphone. Available on the Apple App Store and Google Play.