Stoltenberg: Finland will join NATO on Tuesday

STORY: The announcement came four days after Turkey's parliament approved a bill to allow Finland to join NATO, clearing the way for the country to become part of the Western defense alliance as war rages in Ukraine.

Finland has a 1,300-km (810-mile) border with Russia, meaning NATO's frontier with Russia will roughly double in length, and the move drew a pledge from Moscow that it will beef up its forces in border regions.

Finland and Sweden asked to join NATO last year in response to Russia's invasion of Ukraine. But the process has been held up by Turkey and Hungary. The parliaments of all NATO members must ratify newcomers.