"We have to strengthen our fleet of fighter jets and it is completely logical to acquire more F-35 fighter jets," Defence Minister Troels Lund Poulsen told the Borsen newspaper after Denmark announced a huge increase in defence spending.

Poulsen's department declined to give more details about any future order when contacted by AFP.

Questions about whether it is wise for Denmark to keep buying weapons from the United States have been put into sharp focus since Trump's rapprochement with Russia and threats of aggression against Canada and Greenland.

Canada said this month that it would re-examine its purchase of F-35s and look at other options.

But Poulsen said: "It's completely unrealistic to think that we could stop cooperating with the United States and buying its military equipment.

"It's problematic to see a new US administration say things with which we don't agree but to pull the plug on more than 75 years of cooperation is, in my opinion, completely wrong."

Since December and Trump's first announcements that he intends to annex Greenland, the Arctic island's politicians, backed by Copenhagen, have said the territory is not for sale but "open for business".

The first of 27 F-35 jets already bought and ordered by Denmark should be operational next month.