(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.

Russian forces have since retreated from northern Ukraine, leaving behind a trail of death and destruction. The United States and many European countries accused Russia of committing war crimes after graphic images emerged of dead civilians in the town of Bucha, near Kyiv. The Russian military has now launched a full-scale ground offensive in eastern Ukraine’s disputed Donbas region, as it attempts to capture the strategic port city of Mariupol and secure a coastal corridor to the Moscow-annexed Crimean Peninsula.

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

Apr 21, 6:44 am
Putin claims ‘success’ in Mariupol siege

Russian President Vladimir Putin declared on Thursday that his siege of Mariupol had been a success, congratulating his defense minister and thanking Russian troops.

“The completion of the combat work to liberate Mariupol is a success,” Putin said. “I congratulate you. Convey words of gratitude to the troops.”

Putin’s claim of victory came as he ordered troops to abandon their assault on the Azovstal Iron and Steel Works plant, the last holdout for Ukrainian troops in the port city.

A Ukrainian commander of the regiment at the site said Ukrainian troops there are ready to surrender, if their safety can be guaranteed by a third party and they are allowed to take the bodies of their dead with them.

Ukrainian President Volodymyr Zelenskyy’s office called for negotiations inside Mariupol to get anyone left in the factory out of the area alive.

Apr 21, 5:13 am
Putin cancels Mariupol plant attack, orders site blocked off

Russian President Vladimir Putin canceled his military’s attack on a Mariupol steel plant, one of the last areas in the port city held by Ukrainian forces, ordering his troops to instead seal all exit routes from the sprawling plant.

“I consider the proposed assault on the industrial zone impractical,” Putin told Sergei Shoigu, his defense minister, during a meeting televised on Thursday by Russian state media, according to a translation of the Kremlin’s official transcript.

The Mariupol city council claimed Tuesday that there are at least 1,000 civilians, mostly women with children and the elderly, seeking shelter in the Azovstal Steel and Iron Works plant. It was unclear how many Ukrainian troops were defending the site.

Putin in the televised meeting ordered his troops to “block” the industrial zone. He repeated the claim that Moscow would let troops leave unharmed if they lay down their weapons and surrender.

“There is no need to climb into these catacombs and crawl underground on these industrial facilities,” Putin said. “Block this industrial area so that the fly does not fly.”

Apr 20, 4:37 pm
Delegations walk out on Russian official

During a G20 meeting of economic and finance ministers on Wednesday, delegations from several countries, including U.S. Treasury Secretary Janet Yellen, walked out of the room while Russia’s delegate began his remarks, the White House confirmed.

Canada’s Finance Minister, Chrystia Freeland, tweeted a photo of several officials, including herself, Yellen, U.S. Federal Reserve chair Jerome Powell and European Central Bank president Christine Lagarde, outside of the meeting room, standing in solidarity with Ukrainian Finance Minister Serhiy Marchenko.

“It’s an indication of the fact that President Putin and Russia has become a pariah on the global stage,” White House press secretary Jen Psaki told reporters.

The Treasury also unveiled new sanctions Wednesday against dozens of Russian and Belarusian people and institutions, including a key commercial bank and a virtual currency mining company.

“This is part of our stepped-up effort to crack down on those attempting to evade our unprecedented sanctions,” Psaki said.

The State Department has also imposed visa restrictions on over 600 Russians, Belarusians and Ukrainian separatists backed by the Kremlin, Secretary of State Antony Blinken said.

Apr 20, 3:59 pm
UN chief seeks peace talks with Putin, Zelenskyy

United Nations Secretary-General António Guterres wrote separate letters to Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy on Tuesday asking to meet “to discuss urgent steps to bring about peace in Ukraine,” a UN spokesperson said on Wednesday.

Mykhailo Podoliak, adviser to the head of the president’s office, tweeted that Ukraine is ready to hold a special round of negotiations in Mariupol.

Apr 20, 3:25 pm
Thousands more Russians enter Donbas: US official

Four more Russian battalions, each made up of roughly 800 to 1,000 troops, have crossed into Ukraine over the last 24 hours, a senior U.S. defense official said Wednesday. Three of those battalions — or up to 3,000 troops — moved to the disputed Donbas region in eastern Ukraine, the official said.

Four flights carrying military aid, including artillery, from the Biden administration’s most recent $800 million package arrived in Ukraine over the last 24 hours, the official said. More supplies are set to arrive over the next day, the official said.

When ABC News asked why the U.S. decided to send artillery, the official responded: “We’re mindful of the importance of artillery in the fight that they’re in right now and in the fighting in the days to come because of the terrain, and because of what we think they’re going to be up against with Russian forces.”

Another reason was “the fact that it wouldn’t require an onerous amount of training for the Ukrainians to know how to use them” and the ability to ship them quickly, according to the official.

Apr 20, 2:12 pm
Humanitarian corridor from Mariupol didn’t work as planned Wednesday

Ukraine’s Deputy Prime Minister Iryna Vereshchuk said Wednesday’s humanitarian corridor from Mariupol didn’t work as planned but evacuation efforts will continue Thursday morning.

“Due to the lack of control over their own military on the ground, the occupiers were unable to ensure a proper ceasefire,” Vereshchuk said in a statement.

There also wasn’t “timely transportation of people to the point where dozens of our buses and ambulances were waiting,” Vereshchuk said.

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