This was CNBC's live blog tracking developments on the war in Ukraine. See below for the latest updates. 

Russian Defense Minister Sergei Shoigu has claimed that Ukraine is suffering "colossal losses" on the east bank of the Dnipro river, which is occupied by Russian forces in the southern Kherson region.

Ukrainian and Russian officials confirmed last week that Ukrainian units had managed to cross the Dnipro river — which has effectively acted as a front line between Russian and Ukrainian forces on either side of the wide waterway — and had established several footholds in villages on the east bank of the river.

Russia promised to inflict "hell" on the Ukrainian units there and Shoigu claimed Tuesday that Ukrainian Marines and Special Ops personnel were suffering huge losses while trying to gain ground. CNBC was unable to verify the claims made by Shoigu or the battlefield assessment.

Ukrainian and Russian forces continue to conduct offensive operations in the east and south of the country despite deteriorating weather conditions on the ground in Ukraine.

A number of Ukrainian officials and Russian "milbloggers" closely following developments in the war have noted that both sides continue to conduct assaults despite the snow and frost.

Photos show Kyiv covered in Snow as war rages on

Photos published via Getty Images on Wednesday show Ukraine's capital Kyiv covered in snow as daily life continues amid Russia's full-scale invasion.

— Sophie Kiderlin

Putin says war in Ukraine is a 'tragedy'

Russian President Vladimir Putin said the Group of 20 (G20) nations has to think about ways to stop the war in Ukraine, describing it as a "tragedy."

Addressing the virtual G20 summit hosted by India on Wednesday, Putin said that Russia had never refused to participate in peace talks with Ukraine, according to comments reported by news agency TASS.

Instead, Putin once again blamed Ukraine for previous peace talks failing, and then claimed there is a law in Ukraine prohibiting discussions.

"Of course, we must think about how to stop this tragedy. By the way, Russia has never refused peace negotiations with Ukraine; it was not Russia, but Ukraine that publicly announced that it was withdrawing from the negotiation process. And moreover, it was a decree, a decree of the head of state, was signed prohibiting such negotiations with Russia," Putin said, TASS reported.

Russia invaded Ukraine in February 2022 but has invariably blamed Ukraine and NATO for the war, claiming the West wanted to inflict a "strategic defeat" on Russia, without presenting evidence. NATO countries, which have provided Ukraine with military, financial and humanitarian aid, say they are helping Ukraine to defend its sovereignty and territorial integrity.

Russia remains a member of the G20 although it was kicked out of the smaller, more exclusive G8 back in 2014 after it invaded and annexed Crimea.

Kyiv has previously attended peace talks with Russia but these failed and since then both sides have hardened their stances and cemented "red lines" preventing any peace deal. Ukraine has said negotiations won't restart while Russian troops are on its territory.

— Holly Ellyatt

'Confused' infantry combat on east bank of the Dnieper river

The U.K.'s Ministry of Defence described fighting between Russian and Ukrainian forces on the east (or left) bank of the Dnieper river as "confused" and taking place in a "complex" terrain.

In an intelligence update on X, formerly known as Twitter, the ministry said that fighting has continued around the village of Krynky where Ukrainian marines maintain a bridgehead on the east bank of the Dnieper river. Ukraine and Russia confirmed last week that units had crossed the river and established several footholds on the east bank, the side of the river occupied by Russian forces.

Since then, fighting has been concentrated around several villages, including Krynky.

"The ground fighting has been characterised by confused, dismounted infantry combat and artillery exchanges in complex, wooded terrain," the U.K.'s defense ministry said Wednesday.

"Ukraine has made particularly effective use of small attack uncrewed aerial vehicles, while the Russian Air Force is conducting significant numbers of sorties in support of frontline troops, predominantly launching munitions from beyond the range of Ukraine's air defences."

The ministry noted that, while the fighting around Krynky is on a smaller scale than some major battles of the war, it "will be considered highly unfortunate by Russian leaders."

"Russia withdrew from the west bank of the Dnipro River a year ago, almost certainly aiming to hold Ukrainian forces west of the river, keep the sector quiet, and free up Russian forces elsewhere."

— Holly Ellyatt

Putin to address G20 shortly

Russian President Vladimir Putin is expected to address members of the Group of 20 (G20) later on Wednesday.

The Kremlin said Tuesday that Putin will set out Russia's position on global affairs and "the current situation, which is very, very turbulent," news agency TASS reported.

G20 leaders are also expected to discuss the global economy, finances and climate change during the event chaired by India's prime minister, Narendra Modi.

Russia remains a member of the G20, a group of industrialized nations, including European nations as well as the U.S., Saudi Arabia, China, Turkey, South Korea and Japan. Russia was suspended from the smaller G8 format following its annexation of Crimea in 2014.

Putin's address is due around 12.30 p.m. London time.

— Holly Ellyatt

Kremlin declines to comment on suggestion that Russia may get ballistic missiles from Iran

The Kremlin declined on Wednesday to comment on a suggestion by White House spokesman John Kirby that Iran may be considering providing Russia with ballistic missiles for use in Ukraine.

"We are developing relations with Iran, including in the field of military-technical cooperation, but we do not comment on this information," Kremlin spokesman Dmitry Peskov told reporters in a regular news briefing.

Kirby said the United States would monitor the situation between Iran and Russia, and take appropriate action as needed.

— Reuters

Is Russia scaling back attacks on Avdiivka — or preparing for a 'third wave'?

There are question marks over whether Russia is scaling back attacks on the eastern Ukraininan city of Avdiivka, or preparing for a "third wave" of assaults.

The town has experienced intense assaults by Russian forces in recent weeks as they try to encircle the strategically important town and its coke and chemical plant. Ukrainian military spokesperson Oleksandr Shtupun said Tuesday that Ukraine had observed fewer attacks from Russian forces and a reduction in air attacks, however.

"Russian occupying forces have reduced the number of ground and air attacks, though they still violate the rules of war by shooting at medical teams and evacuation vehicles," Shtupun told national television, in comments reported by Sky News.

Still, Shtupun noted that "the invaders are not abandoning their plans to surround Avdiivka. Eight attacks were repelled today," he said Tuesday.

The head of Avdiivka's military administration, Vitaliy Barabash, noted on the Avdiivka Telegram account that Russian forces were waiting for the weather to improve, and were regrouping in preparation for "the third wave of assault."

— Holly Ellyatt

No letup in fighting despite deteriorating weather

Ukrainian and Russian forces continue to conduct offensive operations in the east and south of the country despite rainy and snowy weather conditions, analysts at the Institute for the Study of War noted Tuesday.

Ukrainian Kherson Oblast Military Administration Advisor Serhiy Khlan noted on Monday that Russian shelling of the west bank of the Kherson region had decreased in light of poor weather conditions while Nadiya Zamryha, the spokesperson for the Ukrainian 14th Mechanized Brigade, noted Tuesday that Russian forces continue to conduct assaults in the Kupyansk area in the Kharkiv region in eastern Ukraine despite the snow and frost.

The ISW also noted that Ukrainian President Volodymyr Zelenskyy emphasized the need to strengthen Ukrainian capabilities before winter during a meeting with U.S. Secretary of Defense Lloyd Austin on Monday.

So-called "milbloggers" have also been commenting on deteriorating weather conditions. Milbloggers have become a key feature of the Russian pro-war information space, although some have been critical of the defense ministry and its war strategy.

"Russian milbloggers claimed on November 20 and 21 that both Russian and Ukrainian forces are struggling to operate drones, including for artillery fire adjustment, in the poor weather conditions throughout the front," the ISW noted in analysis Tuesday.

"Russian milbloggers also claimed that muddy conditions are complicating vehicle movements but that both Ukrainian and Russian forces continue to maneuver and operate in all directions," it said.

"[The] ISW continues to assess that freezing weather conditions during the winter will likely prompt the resumption of more active combat operations, and ongoing rainy weather is unlikely to halt Ukrainian or Russian attacks," it added.

— Holly Ellyatt

Russia claims Ukraine's suffering 'colossal losses' on east bank of the Dnieper river

Russian Defense Minister Sergey Shoigu claimed Tuesday that Ukraine has failed to achieve any breakthrough on the east (left) bank of the Dnieper river in the Russian-occupied part of the southern Kherson region.

Ukrainian and Russian officials confirmed last week that Ukrainian units had managed to cross the Dnieper river — which has effectively acted as a front line between Russian and Ukrainian forces on either side of the wide waterway — and had established several footholds in villages on the east bank of the river.

Russia confirmed the crossing had taken place but promised to inflict "hell" on the Ukrainian units that had entered occupied territory and intense fighting has been reported around several villages as Russian forces counterattack.

Shoigu said Tuesday that Ukrainian Marines and Special Ops personnel were suffering huge losses while trying to gain ground there.

"All attempts of the Ukrainian Armed Forces to conduct an amphibious operation in the Kherson direction were unsuccessful. Thanks to the proactive and professional actions of our military personnel, units of the Marine Corps and special operations forces of the Ukrainian troops are suffering colossal losses," Shoigu said in a speech to defense ministry officials, without presenting evidence.

Shoigu then claimed that Ukraine had lost 13,700 military personnel since the start of November. He also said that Ukraine had lost 1,800 pieces of military hardware. 

CNBC was unable to verify the claims made by Shoigu or the battlefield assessment.

— Holly Ellyatt

Russia says co-existence not possible with Ukraine's current 'regime'

Russia cannot co-exist with the current Ukrainian "regime" and will resist the might of the NATO military alliance for as long as Moscow needs to achieve its aims, a senior Russian foreign ministry diplomat said on Tuesday.

"The current regime is absolutely toxic, we do not see any options for co-existence with it at the moment," Russian Ambassador-at-Large Rodion Miroshnik told reporters in Moscow.

Miroshnik said Ukraine had carried out crimes against civilians and that NATO had supplied forbidden weapons to Ukraine but that the West would eventually lose interest in Ukraine.

"We can resist NATO just as much as we need to fulfil the tasks that the president has formulated," Miroshnik said.

— Reuters

Kremlin calls Ukraine's 2014 revolution a foreign-sponsored coup

The Kremlin described Ukraine's 2014 revolution, which Kyiv is commemorating on Tuesday, as a foreign-sponsored coup.

Nov. 21 marks the beginning of pro-European mass protests in Ukraine in 2013 that led to the "Maidan" revolution in February 2014 and the ousting of Ukraine's then pro-Russian President Viktor Yanukovich.

As Ukraine marks what has come to be known as the "Day of Dignity and Freedom," commemorating the uprising, Kremlin spokesperson Dmitry Peskov said the Maidan revolution was the result of foreign interference.

"The fact that it was sponsored from abroad has been acknowledged, directly and indirectly, by representatives of foreign countries. That is no secret to anyone," Peskov said.

"We call it "Maidan," but in fact it was a coup, a forceful coup that was sponsored from abroad. We must call things by their proper names," Peskov said, according to comments reported by news agency Tass.

"The fact that it was sponsored from abroad, was directly and indirectly recognized by representatives of foreign countries. This is also no secret to anyone," he said. Peskov did not present evidence for the claim, one that Russia has made repeatedly.

The 2014 Maidan revolution marked a more definite split with Russia which, shortly afterward, invaded and annexed Crimea.

— Holly Ellyatt

'We have to be strong,' Ukraine says as it remembers uprisings

Ukrainian President Volodymyr Zelenskyy told Ukrainians that they must be tenacious in the battle against Russia, as Kyiv commemorated pro-Western uprisings that cemented its split with Russia.

Celebrated as the "Day of Dignity and Freedom," Nov. 21 is a public holiday established to honor the beginning of two anti-Russian uprisings in Ukraine — the Revolution of 2004 and 2014's Revolution of Dignity that began with a wave of pro-European and anti-Russian protests, known as the Euromaidan or Maidan uprising, 10 years ago.

The 2013-2014 protests in Ukraine were a catalyst for Russia's annexation of Crimea in March 2014 and support for pro-Russian separatists in eastern Ukraine.

"10 years ago, we started a new page in the struggle. 10 years ago, Ukrainians launched their first counteroffensive. Against lawlessness, against the attempt to deprive us of our European future. Against our subjugation," Zelenskyy said in his nightly address.

"We fought and we are still fighting. Both in the center of the capital back then and on the outskirts of Bakhmut now. On Hrushevskoho Street then and near Kharkiv, near Kherson, near Avdiivka now ... We have to be strong. Because people believe in the strong only, and only the strong create the future. Only the strong can be united."

— Holly Ellyatt

Read CNBC's previous live coverage:

Russia says co-existence not possible with Ukraine's current 'regime'; Kyiv marks uprising anniversary