US President Donald Trump told Norway’s Prime Minister Jonas Gahr Støre that he no longer feels bound “to think purely of Peace” because the Norwegian Nobel Committee did not award him the Nobel Peace Prize.

In an extraordinary message to Støre, first reported by PBS and confirmed by the Norwegian prime minister, Trump linked his repeated threats to seize control of Greenland to the fact that he has not been awarded the Nobel Peace Prize, which he has long coveted. President Donald Trump warned Europe that he no longer feels “the obligation to think purely of peace,” linking his hostile campaign to seize Greenland to his failure to win the Nobel Peace Prize, Norway’s leader has said.

The message was the latest move in the spiralling transatlantic tensions between the United States and Europe, which vowed Monday not to be blackmailed by Trump’s intensifying pressure to take over the Danish territory. As European powers scrambled to respond to Trump’s promise to implement tariffs on countries that stand in his way, Norwegian Prime Minister Jonas Gahr Støre went public with the president’s warning.

The White House did not immediately respond to an overnight request for comment from NBC News. Later, Trump was guarded when NBC News asked how far he’d go to take control of the semi-autonomous Danish territory.