The Americans, Andy Tai Ngoc Huynh and Alexander Drueke, are both from Alabama.
Russian President Vladimir Putin's "special military operation" into neighboring Ukraine began on Feb. 24, with Russian forces invading from Belarus, to the north, and Russia, to the east. Ukrainian troops have offered "stiff resistance," according to U.S. officials.
The Russian military has since launched a full-scale ground offensive in eastern Ukraine's disputed Donbas region, capturing the strategic port city of Mariupol and securing a coastal corridor to the Moscow-annexed Crimean Peninsula.
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A look at the two leaders at the center of the war in Ukraine and how they both rose to power, the difference in their leadership and what led to this moment in history.
United Nations Secretary-General Antonio Guterres will meet with Ukrainian President Volodymyr Zelenskyy and Foreign Minister Dmytro Kuleba in Kyiv on April 28.
Guterres will also meet with staff of U.N. agencies to discuss scaling up humanitarian assistance to the people of Ukraine.
The Russian Defense Ministry announced that one servicemember died and another 27 crew members went missing from its Black Sea Fleet flagship vessel Moskva last week.
"The remaining 396 crew members were evacuated from the cruiser to the ships of the Black Sea Fleet," the defense ministry said Friday.
The warship sank on April 14 following what the Ukrainians claimed was a missile attack. Russia did not acknowledge an attack on the ship and continued to say a fire broke out after ammunition detonated.
The defense ministry's latest announcement contradicts its earlier statement that all Moskva crew members had been rescued.
-ABC News' Somayeh Malekian
More than 20 countries have accepted an invitation to attend a Ukraine-focused defense talk on Tuesday hosted by the U.S., Pentagon press secretary John Kirby said Friday.
More than 40 NATO and non-NATO countries have been invited to the talks, which will be hosted by U.S. Defense Secretary Lloyd Austin at Ramstein Air Base in Germany, Kirby said.
"The goal is to bring together stakeholders from all around the world for a series of meetings on the latest [Ukrainian] defense needs and … ensuring that Ukraine’s enduring security and sovereignty over the long-term is respected and developed,” Kirby said.
-ABC News' Somayeh Malekian
United Nations Secretary-General António Guterres will meet with Russian President Vladimir Putin and Russian Foreign Minister Sergey Lavrov in Moscow on Monday.
Guterres wrote separate letters to Putin and Ukrainian President Volodymyr Zelenskyy on Tuesday asking to meet "to discuss urgent steps to bring about peace in Ukraine," a U.N. spokesperson said earlier this week.
