Several European leaders warned on Monday of a growing threat from Russia after the previous day's attack on a train in Ukraine, near the Polish border.
Speaking at an Arctic summit in the Finnish city of Rovaniemi, Finland's Prime Minister Petteri Orpo said the train attack had shown that Russia was becoming more aggressive from day to day.
He warned that Russia was a permanent threat and said Moscow would move its armed forces to the border of Finland and other European countries after the Ukraine conflict was over.
European nations had to support Ukraine in its fight against the Russian invasion even more decisively than before, he said, adding that more political measures and sanctions were needed to show Moscow that it was on the wrong path.
On Sunday, the Russian military attacked a passenger train travelling from Kiev to Warsaw with a combat drone, near the Polish border. Ukraine's rail company later speculated that the target may have been Western diplomats and former politicians travelling back from a conference in Kiev.
The EU's chief diplomat Kaja Kallas said the attack "was clearly a message to the Western world" intended to scare Western countries away from supporting Ukraine and travelling there.
"I think we should act the opposite. We should show that we are there for Ukraine, and we are not scared," Kallas said.
Lithuanian President Gitanas Nausėda warned against limiting the Russian threat perception to individual regions. Incidents of hybrid warfare, suspected to be orchestrated by Moscow, were occurring not only in the Baltic states but also in Germany and elsewhere, he said.
Latvian Prime Minister Andris Kulbergs pointed out that Russia was exploiting the predictability of Europe's NATO allies, and argued that they had to act more smartly and coordinate more closely.
