(NEW YORK) — 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.

Here’s how the news is developing. All times Eastern:

Aug 30, 11:07 AM EDT
Russian forces shelling corridors leading to nuclear plant, Ukraine says

Mykhailo Podolyak, a senior adviser to Ukrainian President Volodymyr Zelenskyy, said Russian forces are shelling corridors the International Atomic Energy Agency mission would take to reach the Zaporizhzhia power plant in southeastern Ukraine.

Podolyak said Russian forces are probably shelling the path to ensure the IAEA mission pass through Russian-controlled territory to reach the plant.

Aug 29, 4:38 PM EDT
Zelenskyy vows to reclaim all territory lost to Russian forces

Ukrainian President Volodymyr Zelenskyy on Monday vowed to reclaim all territory lost to Russian forces.

“Ukraine is returning its own. And it will return the Kharkiv region, Luhansk region, Donetsk region, Zaporizhzhia region, Kherson region, Crimea. Definitely our entire water area of the Black Sea and the Sea of Azov, from Zmiinyi Island to the Kerch Strait,” he said in his daily address. “This will happen. This is ours. And just as our society understands it, I want the occupiers to understand it, too. There will be no place for them on Ukrainian land.”

Zelenskyy said his message to Russian fighters is that if they want to survive, it’s time for them to flee or surrender.

“The occupiers should know, we will oust them to the border — to our border, the line of which has not changed. The invaders know it well,” he said. “If they want to survive, it is time for the Russian military to flee. Go home. If you are afraid to return to your home in Russia, well, let such occupiers surrender, and we will guarantee them compliance with all norms of the Geneva Conventions.”

Aug 29, 3:00 PM EDT
White House calls for controlled shutdown of Zaporizhzhia nuclear reactors, DMZ around plant

White House spokesman John Kirby said Monday that Russia should agree to a demilitarized zone around the Zaporizhzhia nuclear power plant and that a controlled shutdown of the reactors “would be the safest and least risky option in the near-term.”

Kirby also expressed support for the IAEA mission to the power plant.

“We fully support the International Atomic Energy Agency Director General Grossi’s expert mission to the power plant, and we are glad that the team is on its way to ascertain the safety, security and safeguards of the systems there, as well as to evaluate the staff’s working conditions,” he said. “Russia should ensure safe, unfettered access for these independent inspectors.”

-ABC News’ Ben Gittleson

Aug 29, 1:33 PM EDT
Ukrainian forces launch major counteroffensive

Ukrainian forces have launched a major counteroffensive in multiple directions in the southern part of Ukraine, Natalia Humeniuk, a spokesperson for Ukraine’s Operational Command, said Monday.

Humeniuk said the situation in the south remains “tense,” but controlled.

Ukrainians have been targeting strategic Russian command posts and slowly advancing toward Kherson for weeks. Kherson was first major city in the south to be captured by Russian forces following the invasion.

Russian military issued a statement confirming the offensive and claiming Ukraine sustained heavy losses.

Meanwhile, at least 12 missiles have struck Mykolaiv, which remains under Ukraine’s control in the south. Two people were killed and 24 were wounded, according to the governor of Mykolaiv Oblast.

-ABC News’ Max Uzol and Natalia Shumskaia

Aug 29, 12:47 PM EDT
Ukrainian official accused of treason is shot and killed

Oleksiy Kovalyov, a Ukrainian official who was accused of treason for openly collaborating with Russia, was shot and killed in his home on Sunday in Hola Prystan, Kherson Oblast, according to preliminary information from the Investigative Committee of Russia (SKR). An unidentified woman was also killed, SKR said.

Kovalyov was a Ukrainian lawmaker from President Volodymyr Zelenskyy’s party who was accused of treason; criminal proceedings were initiated by Ukraine’s State Bureau of Investigations in June. He is one of the highest-ranking Ukrainian defectors who fled to Kherson after the invasion and openly collaborated with Russia. He was appointed by the Russians as the deputy head of the Kherson Military-Civil Administration.

Aug 29, 12:19 PM EDT
IAEA says mission to Zaporizhzhia nuclear power plant ‘on its way’

The head of the United Nations’ nuclear watchdog announced Monday that the agency’s long-awaited expert mission to the Zaporizhzhia power plant in southeastern Ukraine “is now on its way.”

“The day has come,” Rafael Grossi, director general of the International Atomic Energy Agency, said in a post on Twitter.

Grossi, who is leading the IAEA’s “Support and Assistance Mission to Zaporizhzhia,” has long sought access to the nuclear power plant, which is the largest in Europe. Russia and Ukraine have traded accusations of shelling at or near the site in recent weeks, fueling fears that the fighting could cause a nuclear disaster.

“We must protect the safety and security of #Ukraine’s and Europe’s biggest nuclear facility,” Grossi tweeted, alongside a photo of himself with 13 other experts. “Proud to lead this mission which will be in #ZNPP later this week.”

Shortly after invading neighboring Ukraine on Feb. 24, Russian troops stormed the Zaporizhzhia nuclear power plant near the town of Enerhodar, on the banks of the Dnipro River in the country’s southeast. The Ukrainian workers have been left in place to keep the plant operating, as it supplies electricity across the war-torn nation.

Kremlin spokesperson Dmitry Peskov said the IAEA team will travel to the plant via Ukrainian-controlled territory, state-run TASS reported.

The area around the nuclear plant is controlled by Russian forces. Peskov said once the IAEA team enters Russian-controlled territory, all necessary security will be provided.

Aug 29, 2:21 AM EDT
IAEA says mission to Zaporizhzhia nuclear power plant ‘on its way’

The head of the United Nations’ nuclear watchdog announced Monday that the agency’s long-awaited expert mission to the Zaporizhzhia power plant in southeastern Ukraine “is now on its way.”

“The day has come,” Rafael Grossi, director general of the International Atomic Energy Agency, said in a post on Twitter.

Grossi, who is leading the IAEA’s “Support and Assistance Mission to Zaporizhzhia,” has long sought access to the nuclear power plant, which is the largest in Europe. Russia and Ukraine have traded accusations of shelling at or near the site in recent weeks, fueling fears that the fighting could cause a nuclear disaster.

“We must protect the safety and security of #Ukraine’s and Europe’s biggest nuclear facility,” Grossi tweeted, alongside a photo of himself with 13 other experts. “Proud to lead this mission which will be in #ZNPP later this week.”

Shortly after invading neighboring Ukraine on Feb. 24, Russian troops stormed the Zaporizhzhia nuclear power plant near the town of Enerhodar, on the banks of the Dnipro River in the country’s southeast. The Ukrainian workers have been left in place to keep the plant operating, as it supplies electricity across the war-torn nation.

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