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

The United Kingdom announced a new wave of sanctions on Thursday targeting Russians involved in the barbaric treatment of children in Ukraine.

Maria Lvova-Belova, Russia's Children Rights Commissioner, tops the new list of sanctioned individuals for her alleged involvement in the forced transfer and adoption of Ukrainian children. She has been accused of enabling 2,000 vulnerable children being violently taken from the Luhansk and Donetsk regions and orchestrating a new policy to facilitate their forced adoptions in Russia.

“Today we are targeting the enablers and perpetrators of [Russian President Vladimir] Putin’s war who have brought untold suffering to Ukraine, including the forced transfer and adoption of children,” U.K. Foreign Secretary Liz Truss said in a press release.

More than 900 children were injured in Ukraine as a result of the full-scale armed aggression by the Russian Federation, according to the Ukrainian Prosecutor General’s latest report. Over 320 children were killed and more than 580 were injured.

These figures are far from being final, with more information slowly trickling in from places of active hostilities, as well as the temporarily occupied and liberated territories.

The UK's sanction list also includes Patriarch Kirill, the head of the Russian Orthodox Church, for his support and endorsement of Putin’s war.

Several members of Putin's political elite, along with four Military Colonels from a unit known to have killed, raped and tortured civilians in the Ukrainian town of Bucha, appear on the list too.

“Putin’s allies continue to choose to turn a blind eye to alleged war crimes and support his bloody offensive,” the U.K. government said. With Putin’s aggression reaching beyond Ukraine as Russian exports fuel conflict across the globe, the official press release read, the new sanctions also hit Myanmar’s military Junta.

The Junta relies heavily on Russian air assets and limiting it will cut Putin off from profiting from sales that fund his war machine, the U.K. said.

-ABC News' Edward Szekeres, Yuriy Zaliznyak, Yulia Drozd and Max Uzol

The State Department has still not confirmed reports that two former U.S. service members who volunteered to help Ukrainian forces have gone missing, spokesperson Ned Price said Thursday.

The Americans, Andy Tai Ngoc Huynh and Alexander Drueke, are both from Alabama.

"We are limited in terms of what we know at the moment," Price said. "We're closely monitoring the situation we are in contact with Ukrainian authorities, as well as with the International Committee of the Red Cross, and the families of the two reported missing U.S. citizens."

The department has not "seen anything from the Russians indicating that two such individuals are in their custody," Price said.

"If the Russians were to claim that they had such individuals, I assume we would pursue that. If we had reason to believe -- credible reasons to believe -- that these individuals were in Russian custody, we would pursue that as appropriate," Price continued.

Price was asked whether the department was tracking any other cases of Americans purportedly captured on the battlefield, and he said the department was aware of reports about "one additional American whose whereabouts are unknown.”

"Similarly, our understanding was that this individual had traveled to Ukraine to take up arms," Price said. He said the person was identified as missing "in recent weeks" and that the State Department was also in contact with their family.

Alabama Rep. Terri Sewell said that Drueke’s mother reached out to her office after losing contact with him. Sewell is helping the family locate him. Alabama Rep. Robert Aderholt said his office is helping in the search for Huynh after his family reached out to the congressman's office this week.

-ABC News' Shannon Crawford

In the first visit of EU leaders to the Ukrainian capital since Russia’s invasion, German Chancellor Olaf Scholz, French President Emmanuel Macron, Italian Prime Minister Mario Draghi and Romanian President Klaus Iohannis made clear their message of support and solidarity.

Scholz said, "My colleagues and I came here to Kyiv today with a clear message: Ukraine belongs to the European family."

Macron added, "All four of us support [Ukraine's] immediate EU candidacy."

The leaders discussed the possibility of further sanctions against Russia as well as how to rebuild Ukraine after the war.

Earlier in the day, the EU leaders toured Irpin, a town northeast of Kyiv, which was hit by heavy Russian artillery early in the war.

-ABC News' Britt Clennett and Ibtissem Guenfoud

A Ukrainian counteroffensive may conclude by the end of the summer if Ukraine receives the weapons it needs, Major General Dmytro Marchenko of the Ukrainian Armed Forces told Radio Liberty on Wednesday.

“I am just a realist… but the fact is that it will not end quickly,” Marchenko said in response to a question about when ongoing hostilities might end. “In some places we will lose time, let [the Russians] dig in more, so [the fighting] will be longer,” he added.

The Major General also stressed that a "point of no return" had been reached on the issue of peace agreements with Russia. “Why this pile of deaths?... At the very beginning, it was possible to stop all this at the stage of negotiations. But after what [the Russians] did, we passed the point of no return,” Marchenko said.

He added that Ukraine has the pace and desire to finish the war. “Just give us some weapons and we will do it.”

With the U.S. announcing $1 billion more in military aid on Wednesday, Ukrainian President Volodymyr Zelenskyy was quick to thank President Joe Biden during a phone conversation on the same day. Zelenskyy expressed gratitude to Biden for his leadership position in supporting Ukraine's struggle for freedom and for his unwavering backing of Ukraine's independence and territorial integrity.

"The security support from the United States is unprecedented. It brings us closer to a common victory over the Russian aggressor," Zelenskyy said, noting the importance and timeliness of the new military aid package.

"We also appreciate the significant financial and macroeconomic support for Ukraine from the United States. It helps us endure this war," the Ukrainian president said in reference to the $225 million in humanitarian assistance Biden pledged to Ukraine on Wednesday.

"We must win this war and return our occupied territories. This will be our common victory," Zelenskyy concluded.

NATO Secretary General Jens Stoltenberg also thanked the U.S. for its leadership in mobilizing and coordinating international security support for Ukraine that addresses the country's urgent needs for military equipment.

Speaking at the meeting of the U.S.-led Ukraine Defence Contact Group at the NATO Headquarters in Brussels on Wednesday, Stoltenberg welcomed the new round of military aid to Ukraine announced by NATO Allies. On top of the U.S. package, Germany has promised to provide Ukraine with 3 MLRSs while Slovakia pledged to deliver several helicopters and rocket launcher ammunition. Canada, Poland and the Netherlands all promised to boost the short-handed Ukrainian artillery.

“NATO as an organization is stepping up its support,” Stoltenberg said. He added that NATO Allies are committed to continue providing Ukraine with the military equipment it needs to prevail, including heavy weapons and long-range systems.

The Secretary General said that the Allies will agree on a new comprehensive assistance package for Ukraine at the Madrid Summit in late June. This will help Ukraine in the longer-term to transition from Soviet-era equipment to modern NATO weaponry and to enhance interoperability with NATO, Stoltenberg pointed out.

President Zelenskyy confirmed his attendance at the Madrid Summit in a tweet from Wednesday.

-ABC News' Edward Szekeres, Max Uzol, Yuriy Zaliznyak and Yulia Drozd