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.
For previous coverage, please click here.
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.
The Biden administration is preparing to announce another military aid package for Ukraine worth roughly $800 million, a U.S. official said. Details have not been determined but the package is believed to focus more on artillery and ammunition.
-ABC News' Conor Finnegan
Treasury Secretary Janet Yellen will hold a bilateral meeting with Ukrainian Prime Minister Denys Shmyhal in Washington, D.C., on Thursday, a Treasury Department spokesperson confirmed. Ukraine's finance minister will also attend.
The meeting will take place during the annual conferences of the International Monetary Fund and the World Bank. The conferences draw leaders from the G20, of which Russia is currently a member.
While Yellen will participate in some meetings and panels where Russian officials will be present, she will skip others, a Treasury Department official said.
-ABC News' Sarah Kolinovsky
Tennis players from Russia and Belarus have been banned from this summer's Wimbledon Championships due to the "unjustified and unprecedented military aggression" in Ukraine, The All England Lawn Tennis Club said.
"It would be unacceptable for the Russian regime to derive any benefits from the involvement of Russian or Belarusian players," the statement said, adding: "If circumstances change materially between now and June, we will consider and respond accordingly."
Over 5 million people have now fled Ukraine, according to the United Nations High Commissioner for Refugees.
The majority of those refugees -- over 2.8 million -- are in Poland.
