Russia-Ukraine updates: 2 US veterans who joined Ukrainian forces missing

U.S. Secretary of State Antony Blinken announced Thursday that he has authorized a 10th drawdown of additional arms and equipment for Ukraine worth $100 million from U.S. Department of Defense inventories.

This brings total U.S. military assistance to Ukraine to approximately $3.9 billion in arms and equipment since Russia invaded Ukraine on Feb. 24.

"The United States is committed to helping Ukraine continue to meet its defense needs and build its future capabilities, as well as to bolster Allies and partners across NATO’s Eastern Flank and the broader region," Blinken said in a statement.

-ABC News' Shannon Crawford

The Senate voted on Thursday to pass an additional $40 billion in new military and economic aid for Ukraine after President Joe Biden called on Congress for more funding.

The bill received bipartisan support, passing with a vote of 86-11.

The House passed the aid package earlier this month, which is now headed to Biden's desk for signing.

"By passing this aid package the Senate can now say to the Ukrainian people help is on the way: real help, significant help, help that could ensure the Ukrainian people are victorious," Majority Leader Chuck Schumer said during his floor remarks before the vote.

-ABC News' Allison Pecorin

U.S. Chairman of the Joint Chiefs of Staff Gen. Mark A. Milley spoke with Chief of Russian General Staff Gen. Valery Gerasimov Thursday, for the first time since the invasion of Ukraine. They last spoke on Feb. 11.

The two discussed several security-related issues of concern and agreed to keep the lines of communication open, according to a readout from the U.S., but the specific details of their conversation were kept private.

The Russian Ministry of Defense said the two sides "discussed issues of mutual interest, including the situation in Ukraine," in a call it said was initiated by the U.S.

-ABC News' Matt Seyler

President Joe Biden met with the leaders of Sweden and Finland at the White House Thursday after the two countries submitted applications to join NATO.

"Today I'm proud to welcome and offer the strong support of the United States for the applications of two great democracies, and two close, highly capable partners to join the strongest, most powerful defensive alliance in the history of the world," Biden said.

Biden reaffirmed the U.S.'s support for the Nordic countries' applications to join the alliance.

"Finland and Sweden make NATO stronger not just because of their capacity, but because of their strong democracies and a strong united NATO is the foundation of America's security," he said.

Biden also sent a message to Russian President Vladimir Putin and Russia.

"So let me be clear: New members joining NATO is not a threat to any nation. It never has been. NATO's purpose is to defend against aggression, that's its purpose, to defend," Biden said.

-ABC News' Karen Travers and Justin Gomez