According to a fresh government-commissioned, independent assessment of the effects of Finland's possible NATO membership, it would be most beneficial for Finland if Sweden were to join at the same time.

Speaking with Yle on Saturday, President Sauli Niinistö stressed that both countries will make their own independent decision.

"We don't have any kind of automatic, linked destiny that would mean that if one decides something that the other would immediately do the same. On the contrary, it looks like the decision-making process is quite tricky," said Niinistö.

The President did concede that opinions in both countries influence the other, but he added that NATO membership for Finland would require a referendum on the issue.

Sweden will not take up NATO membership without a referendum. It is possible that the decision of the citizens of the two countries could differ, even if the political leaders of both countries were to back membership.

Niinistö described the issue of joining NATO as being at least as big a decision as was joining the EU - a decision that was taken only after a national referendum.

Sensitivities

Turned into the Finnish government on Friday, the assessment of the effects of Finland's possible NATO membership paints a fairly dark picture of Russia. According to President Niinistö, Russian actions are marked by unpredictability. He does see, however, a new kind of dialogue between the United States and Russia on Syria as a positive sign.

The assessment cautions Finland that it should be prepared for harsh reaction from Russia if it were to take up membership. Niinistö agrees that the Russians have clearly shown that they consider NATO a threat.

"They do not want a threat spreading to their border," Niinistö pointed out.

In a recent newspaper interview, Russian Foreign Minister Sergey Lavrov warned Sweden of consequences of NATO membership. The Swedes bristled at Lavrov's remarks.

President Niinistö told Yle that in this respect the Swedes are more sensitive than the Finns.

"In Finland, many people understand that if Russia saw Finland as a threat, then Russia would site military materials close to the border with Finland," he explained.

President Niinistö added that his own view on NATO membership has not been changed by the new assessment report.

"My position is that we have no need to alter our current policy," said Niinistö.