Russia-Ukraine live updates: Ukrainian special forces were in Russia during strike

At least two people were killed and others, including a toddler, were injured.

More than six months after Russian President Vladimir Putin launched an invasion into neighboring Ukraine, the two countries are engaged in a struggle for control of areas throughout eastern and southern Ukraine.

Ukrainian President Volodymyr Zelenskyy, whose forces began an offensive in August, has vowed to take back all Russian-occupied territory. But Putin in September announced a mobilization of reservists, which is expected to call up as many as 300,000 additional troops.

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10 civilians killed in Russian air strike, Zelenskyy says

A Russian airstrike that struck Kurakhov, a city in Donetsk Oblast in southeastern Ukraine, has killed 10 people, Ukrainian President Volodymyr Zelenskyy announced on Wednesday.

Civilian areas such as a market, gas station, bus station and a residential building were among the targets that were struck, Zelenskyy said.

Putin says Russia will not be the first to use nuclear weapons in war with Ukraine

Russian President Vladimir Putin warned on Wednesday the threat of nuclear war is increasing but Russia will not be the first to use nuclear weapons.

Putin, speaking at Russia's Human Rights Council, said nuclear weapons should act as a deterrent in conflicts, not provoke them.

"We consider weapons of mass destruction, nuclear weapons, it is all built around the so-called retaliatory strike. When we are struck, we strike back," Putin said.

“I have already said: we don’t have our own nuclear weapons, including tactical ones, on the territory of other countries, but the Americans do. Both in Turkey and in a number of other European states ... we haven't done anything yet," Putin said.

-ABC News' Will Gretsky

President Volodymyr Zelenskyy named Time's 2022 'Person of the Year'

Time named Ukrainian President Volodymyr Zelenskyy and the Spirit of Ukraine as the 2022 "Person of the Year."

More than a dozen Ukrainians who embodied the spirit of Ukraine were also named: Dr. Iryna Kondratova, who helped mothers give birth during shelling in the hospital basement; Oleg Kutkov, an engineer who laid the groundwork for the essential connectivity; Olga Rudenko, editor-in-chief of the Kyiv Independent; and Levgen Klopotenko, a Kyiv chef who converted his restaurant into a relief canteen.

“This year’s choice was the most clear-cut in memory. Whether the battle for Ukraine fills one with hope or with fear, the world marched to Volodymyr Zelensky’s beat in 2022," Time Editor-in-Chief Edward Felsenthal said in a statement.

Ukrainian special forces were deep in Russia to guide drone, senior Ukrainian official says

Ukrainian special forces were deep inside Russian territory and helped guide drones to at least one of the bases hit in Monday’s attacks, a senior official from President Volodymyr Zelenskyy’s inner-circle confirmed to ABC News.

-ABC News' Marcus Moore