President of the Republic of Finland Sauli Niinistö . File photoHELSINKI, May 13 Finnish President and Swedish Prime Minister Sauli Niinistö and Magdalena Andersson held a joint telephone conversation with US President Joe Biden on Friday, the Finnish leader said. «Joint telephone conversation with Joe Biden and Magdalena Andersson. We shared our deepest concerns about Russia's war against Ukraine. I spoke about Finland's next steps towards NATO membership. Finland appreciates all the necessary support from the US,» Niinistö wrote on social media.Inter RAO's subsidiary will suspend electricity supplies to Finland On Thursday, Niinistö and Finnish Prime Minister Sanna Marin in a joint statement advocated the country's immediate membership in NATO. Russia began military operation in Ukraine on February 24. President Vladimir Putin called its goal «the protection of people who have been subjected to bullying and genocide by the Kyiv regime for eight years.» For this, according to him, it is planned to carry out «demilitarization and denazification of Ukraine», to bring to justice all war criminals responsible for «bloody crimes against civilians» in Donbass. According to the Russian Ministry of Defense, the Armed Forces strike only at military infrastructure and Ukrainian troops and , on March 25, completed the main tasks of the first stage — significantly reduced the combat potential of Ukraine. The main goal in the Russian military department was called the liberation of Donbass.