(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:
Jun 28, 4:26 pm
20 dead, 40 still missing from mall strike
Twenty people are dead and 59 are wounded from Russia's missile strike on Monday at a mall in the central Ukrainian city of Kremenchuk, according to Kyrilo Tymoshenko, the deputy head of the Office of the President of Ukraine.
Forty people remain missing, Tymoshenko said.
"Several fragments of bodies have been found ripped off limbs and feet of the people," Ukrainian President Volodymyr Zelenskyy told the United Nations Security Council.
He said if Russia denies the devastation was wrought by one of its missiles, he asked the U.N. send an independent representative to the site of the attack to verify for itself.
-ABC News' Shannon Crawford, Oleksii Pshemysko and Fidel Pavlenko
Jun 28, 12:58 pm
Sean Penn meets with Zelenskyy
Sean Penn met with Ukrainian President Volodymyr Zelenskyy in Kyiv on Tuesday after the actor arrived in Ukraine to shoot a documentary, according to Zelenskyy’s office.
Penn, who first came to Ukraine on the day Russia invaded in February, wants to "visit settlements in Ukraine affected by Russian aggression," according to Zelenskyy’s office.
Jun 28, 12:02 pm
Biden: Ukraine 'standing up' to Putin 'in ways that I don't think anyone anticipated'
President Joe Biden and Spanish President Pedro Sanchez delivered remarks Tuesday on new areas of cooperation between the two countries and efforts to keep supporting Ukraine against Russia's invasion.
Biden did not mention Monday’s strike on the Ukraine mall that killed 18, but said the invasion has "shattered peace in Europe and every norm since WWII."
Biden said he and Sanchez discussed the need to continue to provide weapons to Ukraine.
The Ukrainians "are standing up in ways that I don't think anyone anticipated, showing enormous bravery, enormous resolve," Biden said.
He said he believes Putin's objective is to "wipe out the culture of Ukraine."
Biden said NATO allies will be "standing as one" to support Ukraine and teased more military posture commitments in Europe. Biden said the U.S. and Spain are working on an agreement to increase the number of Navy destroyers stationed at Rota Naval Base in Spain.
-ABC News' Justin Ryan Gomez
Jun 28, 11:12 am
Russia bans Biden's wife, daughter from entry
Russia announced Tuesday that it was banning the wife and daughter of U.S. President Joe Biden from entering the country.
The Russian Ministry of Foreign Affairs said the names of 25 U.S. citizens were added to the country's "stop list," including Biden's wife Jill and daughter Ashley. The ministry also banned entry to U.S. Sens. Mitch McConnell, R-Ky., Susan Collins, R-Maine, Ben Sasse, R-Neb., and Kirstin Gillibrand, D-N.Y., whom it identified as "responsible for the formation of the Russophobic course."
"This was done in response to the continuous expansion of U.S. sanctions against Russian politicians and public persons," the ministry said in a statement Tuesday.
Jun 28, 10:41 am
US prohibits Russian gold imports, issues sanctions targeting Russia's defense sector
The U.S. Treasury Department announced Tuesday that it’s prohibiting the import of Russian gold to the U.S., two days after President Joe Biden said the U.S. and other G-7 nations would ban the import of Russian gold.
Secretary of State Antony Blinken said on CNN Sunday that the West’s bans on Russian gold imports would cost Russia about $19 billion in revenue annually.
“It can’t acquire what it needs to modernize its defense sector, to modernize its technology, to modernize its energy exploration,” Blinken said.
The Treasury Department also announced Tuesday that the U.S. is sanctioning 70 entities and 29 individuals “critical” to Russia’s “defense industrial base, including State Corporation Rostec, the cornerstone of Russia’s defense, industrial, technology, and manufacturing sectors.” The Treasury said the State Department is also sanctioning 45 more entities and 29 more individuals, including targeting Russian military units and the FSB.
-ABC News' Ben Gittleson
Jun 28, 8:17 am
Russian forces in Ukraine 'are increasingly hollowed out,' UK says
Ukrainian forces are still consolidating their positions on higher ground in the eastern city of Lyschansak after falling back from nearby Sieverodonetsk, the U.K. Ministry of Defense said Tuesday in an intelligence update.
"Ukrainian forces continue to disrupt Russian command and control with successful strikes deep behind Russian lines," the ministry added.
According to the ministry, Russian forces over the weekend "launched unusually intense waves of strikes across Ukraine using long-range missiles."
"These weapons highly likely included the Soviet-era AS-4 KITCHEN and more modern AS-23a KODIAK missiles, fired from both Belarusian and Russian airspace," the ministry said. "These weapons were designed to take on targets of strategic importance, but Russia continues to expend them in large numbers for tactical advantage. Similarly, it fielded the core elements of six different armies yet achieved only tactical success at Sieverodonetsk."
"The Russian armed forces are increasingly hollowed out," the ministry added. "They currently accept a level of degraded combat effectiveness, which is probably unsustainable in the long term.
Jun 28, 6:22 am
Death toll from mall strike rises to 18
The death toll from a Russian missile strike on a Ukrainian shopping mall continued to rise Tuesday as rescuers sifted through the charred rubble.
Monday's attack in the central Ukrainian city of Kremenchuk killed at least 18 people and wounded 59 others, including 25 who remain hospitalized Tuesday, according to the State Emergency Service of Ukraine. A day of mourning for the victims was declared Tuesday in the wider Poltava Oblast.
Ukrainian President Volodymyr Zelenskyy said Monday in his nightly address that more than 1,000 shoppers and workers were inside the mall during the afternoon attack and that it will take time to "establish the number of victims." He condemned the incident as "one of the most daring terrorist attacks in European history."
Jun 28, 5:49 am
Ukraine joining NATO could lead to WWIII, Russia warns
Russia warned Tuesday that Ukraine joining NATO could lead to World War III should Kyiv then attempt to encroach on the Moscow-annexed Crimean Peninsula.
"Crimea is a part of Russia for us. And that means forever," Russian Security Council Deputy Chairman Dmitry Medvedev said in an interview Tuesday with Russian newspaper Argumenty i Fakty. "Any attempt to encroach on Crimea is a declaration of war against our country. If a NATO member country does so, this would mean a conflict with the North Atlantic Alliance. The World War III. A complete catastrophe."
"Ukraine within NATO is far more dangerous for our country [than Sweden and Finland]," he added. "And this is linked to what [Russian] President Vladimir Putin has repeatedly spoken about: the presence of unresolved territorial disputes, as well as the difference in understanding of the regions' status."
Although Moscow is not opposed to Sweden and Finland joining the military alliance, Russia will still have to reinforce its borders in this case, according to Medvedev.
"Accession of Sweden and Finland to NATO will not pose any new threats to us," he told Argumenty i Fakty. "If they feel better and calmer by joining the alliance, then so be it. Even without them, without Sweden and Finland, NATO is close to our country."
"Should this enlargement of NATO happen, the length of its land borders with Russia will more than double. And we will have to strengthen these borders," he added. "The Baltic region's non-nuclear status will become a thing of the past, the group of land and naval forces in the northern sector will be seriously increased. No one is happy with it. Nor are the citizens of these two NATO candidate countries."
Jun 27, 6:42 pm
Zelenskyy calls mall attack one of 'the most defiant terrorist attack in European history'
Ukrainian President Volodymyr Zelenskyy lashed out against Russian forces in a recorded speech Monday hours after a missile struck a shopping mall in Kremenchuk, calling the attack "one of the most defiant terrorist attacks in European history."
"Only totally insane terrorists, who should have no place on earth, can strike missiles at such an object. And this is not an off-target missile strike, this is a calculated Russian strike -- exactly at this shopping mall," Zelenskyy said.
The Ukrainian president said the rescue and salvage efforts were still ongoing.
Ukraine's Emergency Service reported that 15 people were killed and 59 were injured in the attack as of Monday evening.
"We must be aware that the losses may be significant," Zelenskyy said.
-ABC News' Christine Theodorou
Jun 27, 5:36 pm
G-7 leaders 'condemn' Russian military strike on mall
G-7 leaders released a statement condemning Russia’s missile strike on a shopping mall in Kremenchuk, Ukraine, saying it constitutes a war crime and that President Vladimir Putin “and those responsible will be held to account.”
“We stand united with Ukraine in mourning the innocent victims of this brutal attack," they said.
The summit began in Germany on Sunday with a heavy focus on the invasion of Ukraine, and the group announced more steps to try and stop Putin from funding his war.
“Today, we underlined our unwavering support for Ukraine in the face of the Russian aggression, an unjustified war of choice that has been raging for 124 days. We will continue to provide financial, humanitarian as well as military support for Ukraine, for as long as it takes. We will not rest until Russia ends its cruel and senseless war on Ukraine," G-7 leaders said.
-ABC News' Justin Gomez
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