U.S. President Donald Trump has linked his assertive stance on Greenland to last year’s decision not to award him the Nobel Peace Prize, telling Norway’s prime minister in a text message that he no longer felt "an obligation to think purely of Peace," according to messages made public on Monday.

The communication with Prime Minister Jonas Gahr Støre adds a new dimension to tensions between Washington and its traditional allies, amid Trump’s repeated threats to assert control over Greenland, a self-governing territory of NATO member Denmark.

On Saturday, Trump announced a 10 percent import tax, effective February, on goods from eight nations supporting Denmark and Greenland, including Norway.

The move drew sharp condemnation from those countries, which maintained that Greenland was not for sale while urging the United States to seek diplomatic solutions.

European Union foreign policy chief Kaja Kallas said on social media that the bloc had "no interest to pick a fight" but would "hold our ground."