Russian forces are continuing their attempted push through Ukraine from multiple directions, while Ukrainians, led by President Volodymr Zelenskyy, are putting up "stiff resistance," according to U.S. officials.
The attack began Feb. 24 as Russian President Vladimir Putin announced a "special military operation."
Russians moving from Belarus towards Ukraine's capital, Kyiv, don't appear to have advanced closer towards the city since coming within about 20 miles, although smaller advanced groups have been fighting gun battles with Ukrainian forces inside the capital since at least Friday.
Russia has been met by sanctions from the U.S., Canada and countries throughout Europe, targeting Russia's economy and Putin himself.
Here's how the news is developing. All times Eastern.
Feb 17, 2022, 9:22 AM EST
Russia insists some troops are returning to base
Russia insisted again Thursday that some troops massed near Ukraine are returning to base, far from the border.
Russian Ministry of Defense spokesman Igor Konashenkov said in a statement that units from the Western and Southern Military Districts, which were stationed in western Russia and Crimea, are now moving back to their permanent bases. He said Russian troops taking part in drills in Belarus will also return to base once they finish the exercises this weekend.
Konashenkov noted that the first units have already arrived in Nizhny Novgorod, Chechnya and Dagestan, hundreds of miles from the border with Ukraine.
-ABC News' Patrick Reevell
Feb 17, 2022, 9:07 AM EST
US receives Russia's response on NATO security guarantees
The United States has received a response from Russia regarding the discussion over Moscow's demands for security guarantees that NATO not expand, a senior official with the U.S. Department of State said Thursday.
"We can confirm that we have received a response from the Russian Federation," the official said. "It was delivered to Ambassador Sullivan in Moscow today."
The U.S. government, at Russia's insistence, sent written responses to two draft treaties Moscow published demanding guarantees that Ukraine will never join NATO and that the military alliance pull back its infrastructure from Eastern European countries that joined after the Cold War. Washington rejected those guarantees as non-starters but offered to discuss some confidence-building measures.
Russian Foreign Minister Sergey Lavrov said earlier Thursday that Moscow was planning to send its formal response to the Washington soon.
-ABC News' Conor Finnegan
Feb 17, 2022, 8:30 AM EST
US ambassador to UN: 'Russia is moving toward an imminent invasion'
U.S. Ambassador to the United Nations Linda Thomas-Greenfield warned Thursday that Russia appears to be readying for an "imminent invasion" of neighboring Ukraine.
"The evidence on the ground is that Russia is moving toward an imminent invasion," Thomas-Greenfield told reporters during a background briefing call. "This is a crucial moment."
The United Nations Headquarters building in New York City, Dec. 8, 2021.
Daniel Slim/AFP via Getty Images, FILE
"Our goal is to convey the gravity of the situation," she added. "That’s why Secretary Blinken is coming to New York to signal our intense commitment to diplomacy, to offer and emphasize the path toward de-escalation and to make it clear to the world that we are doing everything -- everything -– we can to prevent a war."
Blinken has already boarded his flight to Munich but will be flying to New York City first to address the U.N. Security Council session at 10 a.m. ET on Thursday.
-ABC News' Conor Finnegan
Feb 17, 2022, 7:34 AM EST
Lukashenko: Russian troops will stay in Belarus 'as long as necessary'
Belarusian President Alexander Lukashenko said Thursday that Russian troops will be in his country for "as long as necessary."
"As long as necessary, the Russian Armed Forces will be here. This is our land, our territory," Lukashenko told Belarusian state media. "We are working here, studying and will continue to study."
Belarusian President Alexander Lukashenko attends the "Allied Resolve" military exercises held by the armed forces of Russia and Belarus at the Osipovichsky training ground in the Mogilev region, Belarus, on Feb. 17, 2022.
Sergei Sheleg/BelTA/Handout via Reuters
Further joint exercises of the armed forces of Russia and Belarus will be discussed with Russian President Vladimir Putin on Friday, according to Lukashenko.
The Belarusian leader has said that any decision on recognizing the self-declared Donetsk and Lugansk people's republics in a breakaway region of southeastern Ukraine known as Donbas will be made jointly with Russia. He added that this decision will be mutually beneficial.
This handout video grab taken and released by the Russian Ministry of Defense on Feb. 16, 2022, shows Su-30SM fighter jets during joint exercises of the armed forces of Russia and Belarus at a firing range near Brest, southwest Belarus.
Russian Ministry of Defense/AFP via Getty Images
Lukashenko has also noted that, in his view, if neighboring Ukraine had wanted to end the conflict with the Russian-backed separatists in Donbas, it would have already done so.
