Finland's new armed forces chief said Russia was unlikely to test NATO's mutual defence clause by attacking a NATO member state in the coming years, but may well continue what he said were hybrid attacks such as jamming and election interference.

Some Western leaders, such as U.S. President Joe Biden, Germany's top military official and Denmark's defence minister, have expressed concern that Russia's longer term plans could include an attack against NATO.

"Of course testing the Article 5 is always possible, but if we take correct action and maintain unity, I consider an attack unlikely," General Janne Jaakkola said.

Jaakkola, whose job is to closely watch what Russia does behind the long border it shares with Finland, said right now Moscow was too busy preparing for its new summer offensive in Ukraine to consider an attack against NATO.