Russia has recently released a warning to Finland as well as Sweden against joining NATO, questioning the move would not provide stability to Europe.
Kremlin spokesman Dmitry Peskov said that, “the alliance remains a tool geared towards confrontation”.
It comes as US defence officials said Russia’s invasion of Ukraine had been a “massive strategic blunder” which is about to bring NATO enlargement.
US officials expect the Nordic neighbours to bid for membership of the alliance, potentially as early as June.
Washington is believed to favour the move, which would see the Western alliance grow to 32 members. Last week, US State Department officials said that negotiations had taken place between NATO leaders and foreign ministers from Helsinki and Stockholm.
Before it launched its invasion, Russia demanded that the alliance agree to halt any future enlargement, but the war has led to the deployment of more Nato troops on its eastern flank and a rise in public support for Swedish and Finnish membership.
Finnish MPs are expected to receive a security report from intelligence officials this week, and Prime Minister Sanna Marin said she is expecting her government “will conclude the discussions before mid of the summers” on whether to make a membership application.
Finland shares a 1,340km (830 miles) long border with Russia and has been rattled by the invasion of Ukraine.