Russia-Ukraine updates: Russian missiles hit close to nuclear reactors: IAEA director

Russian forces shelled the outskirts of Zaporizhzhia overnight, killing at least one civilian, the city's acting mayor, Anatoly Kurtev, said Wednesday.

The strike on the Kushugum community left three homes destroyed and almost 30 others damaged. The civilian who died was a woman, according to Kurtev.

That same night, Ukrainian troops defending the Zaporizhzhia region shot down two Russian missiles, Kurtev said, citing "preliminary information."

"Take care of yourself and your loved ones," the acting mayor said in a statement on Telegram. "Don't ignore the air alarm!"

A source familiar with the operation confirmed to ABC News that Ukraine was behind a Tuesday explosion in Russia-annexed Crimea. One person died from the blasts in Novofedorivka in Crimea, Russia's semi-official Interfax reported, citing Crimean official Sergei Aksyonov.

This is the first major attack in Crimea since the war began in February.

-ABC News’ Britt Clennett and Dada Jovanovic

The U.S. estimates that 70,000 to 80,000 Russians have been killed or wounded since the start of the war in Ukraine, Colin Kahl, the undersecretary for defense for policy at the Department of Defense, told reporters Monday.

"There's a lot of fog in war, but, you know, I think it's safe to suggest that the Russians have probably taken 70 or 80,000 casualties in less than six months," Kahl said. "I think that's kind of in the ballpark."

Kahl would not talk about specific Ukrainian casualties but noted that "Ukrainian morale and will to fight is unquestioned and much higher, I think, than the average morale and will to fight on the Russian side." He added, "I think that gives the Ukrainians a significant advantage."

Russia has gone through "a significant percentage of their precision guided munitions and their standoff munitions," Khal said. Because they’re "running low," they’re not using them as much and keeping what they have in reserve for other contingencies, he said. And because of sanctions against Russia, it will be tougher for the military to rebuild their stocks, he said.

-ABC News’ Luis Martinez

The Pentagon has announced a new $1 billion military aid package for Ukraine.

The package includes more missiles for the HIMARS advanced rocket systems; 1,000 more Javelin anti-tank weapons; 55,000 rounds of artillery for 155mm howitzers; and armored vehicles.

"This package provides a significant amount of additional ammunition, weapons, and equipment that Ukrainians are using so effectively to defend themselves and will bring total U.S. security assistance to Ukraine to approximately $9.8 billion since the beginning of this Administration," Secretary of State Antony Blinken said in a statement.

The Treasury Department also announced Monday another $4.5 billion in direct economic assistance to help support Ukraine's government, including paying salaries and keeping hospitals and schools open.

-ABC News’ Luis Martinez and Sarah Kolinovsky