Finland will formally join NATO in the "coming days," after the country was able to clear its final hurdle, according to NATO Secretary General Jens Stoltenberg.

"Their membership will make Finland safer and NATO stronger. Finland has highly capable forces, advanced capabilities and strong democratic institutions. So Finland will bring a lot to our alliance," Stoltenberg said in a statement Friday.

Turkey was the last of the 30 NATO allies to approve Finland's bid to join the alliance.

-ABC News' Will Gretsky

Russia just struck Kharkiv in eastern Ukraine with multiple missiles, Ukrainian officials said Thursday night.

Local officials in Kharkiv said Russia fired six Soviet-era S-300 surface-to-air missiles.

ABC News reporters heard explosions outside the city center and saw Ukrainian air defense active just before and during the attacks.

There are currently no reports of casualties or damage to infrastructure as a result of the strikes in Ukraine's second-largest city.

There are also reports of Russian strikes in the Dnipro region.

-ABC News' Tom Soufi Burridge

Russian President Vladimir Putin signed a decree on Thursday ordering a spring conscription. Russia will call up 147,000 people to join the Russian Armed Forces from April 1 to April 15.

-ABC News' Will Gretsky

Russian media reporting suggests authorities are preparing to start a major military recruitment aiming to sign up an additional 400,000 troops, the United Kingdom's Defense Ministry assessed.

Russia is presenting the campaign as a drive for volunteer, professional personnel, rather than a new, mandatory mobilization. There is a realistic possibility that in practice this distinction will be blurred, and that regional authorities will try to meet their allocated recruitment targets by coercing men to join up, UK officials said.

Russian authorities have likely selected a supposedly ‘volunteer model’ to meet their personnel shortfall in order to minimize domestic dissent. It is highly unlikely that the campaign will attract 400,000 genuine volunteers, according to UK officials.

However, rebuilding Russia’s combat power in Ukraine will require more than just personnel; Russia needs more munitions and military equipment supplies than it currently has available, UK officials said.

Russia plans to move tactical nuclear weapons in Belarus to the country's western borders, Boris Gryzlov, the Russian ambassador to Belarus, said Sunday.

Gryzlov's announcement comes just three days after Russia and the United States clashed in the United Nations over the Kremlin's plans to deploy tactical nuclear weapons in Belarus. U.S. officials denounced the move as a desperate attempt by Russia to avoid military defeat and “threaten the world with nuclear apocalypse."

Gryzlov said in an address aired on the Belarusian STV channel that tactical nuclear weapons "will be moved to the western borders of our Union State and will increase the possibilities for ensuring our security."

The western border of Belarus is shared by Poland, a NATO country supporting Ukraine. Russian forces have used Belarus as a staging ground for the war in Ukraine.

"This will be done despite the noise in Europe and the United States," Gryzlov said.

Ukrainian President Volodymyr Zelenskyy condemned the decision and slammed Belarusian President Alexander Lukashenko, saying he "no longer decides which weapons are on his territory."

"And does (Vladimir) Putin threaten the world? Of course, if Ukraine does not resist, it will fall, Putin will move on, we have emphasized this many times," Zelenskyy said. "With the help of our friends and partners, our army will stand firm and win what is rightfully ours. Victory and our independence."

-ABC News' Will Gretsky