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

The Russian Defense Ministry provided updates to what it described as the “special military operation in Ukraine” on Sunday, saying that hundreds of Ukrainians were killed in recent attacks.

High-precision air missiles and other attacks launched in Donetsk, Lugansk and Krasnyi on Sunday hit command posts, areas where Ukrainian manpower and military equipment are concentrated and ammunition depots, according to the Russian Defense Ministry.

The attacks killed more than 210 Ukrainian nationals and destroyed as many as 38 armored motor vehicles, the ministry claimed.

Russian air defense also shot down 11 Ukrainian aircraft and intercepted “multiple launch rockets” in the Kharkov region, according to the defense ministry.

The ministry claimed that, in total, 174 Ukrainian aircraft and 125 helicopters, 977 unmanned aerial vehicles, 317 anti-aircraft missile systems, 3,198 tanks and other armored combat vehicles, 408 multiple launch rocket systems, 1,622 field artillery and mortars and 3,077 units of special military vehicles were destroyed during the operation.

President Biden signed the $40 billion Ukraine aid bill into law Saturday, the White House announced in a press release.

The bill provides supplemental emergency funds to Federal agencies to respond and provide assistance to Ukraine.

Ukrainian President Volodymyr Zelenskyy thanked Biden on Twitter for the aid.

"The leadership of US, President Biden & the American people in supporting Ukrainians fight against the Russian aggressor is crucial. Look forward to new, powerful defense assistance. Today it is needed more than ever," Zelenskyy said.

-ABC News' Molly Nagle and Max Uzol

The Russian Foreign Ministry on Saturday published a list of American citizens who are barred from entering the Russian Federation on a permanent basis.

Russia said the move was in retaliation for anti-Russian sanctions currently imposed by the U.S.

The list published on the ministry's website comprises 963 U.S. citizens, including President Joe Biden.

More than 40 countries will be represented at the second meeting of the Ukraine Contact Group, formed last month to coordinate international support for Ukraine, according to Pentagon press secretary John Kirby.

Monday's meeting "will allow us to continue to dip into a process to get Ukraine, or at least to make other nations available and knowledgeable about what Ukraine needs as the fight is ongoing," Kirby told reporters during a briefing Friday.

More than 40 nations attended the first meeting both virtually and in-person at Ramstein Air Base in Germany. New countries will attend the second, which will be strictly virtual, Kirby said.

"There are some countries that have shown an interest in participating that weren't in the first meeting," said Kirby, who called the first iteration "a true global community" of countries in NATO and beyond.

-ABC News' Matt Seyler