Ukraine says Russian forces blew up a gas pipeline in Kharkiv, the country's second-largest city.
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A defiant President Volodymyr Zelensky said Saturday Ukrainian forces were repelling Russian troops advancing on Kyiv, as Western nations announced they were shipping more weapons to help the country's outgunned military.
Reuters witnesses in Kyiv reported occasional blasts and gunfire in the city on Saturday evening, but it was not clear exactly where it was coming from. The capital and other cities have been pounded by Russian artillery and cruise missiles.
A U.S. defence official said Ukraine's forces were putting up "very determined resistance" to the three-pronged Russian advance that has sent hundreds of thousands of Ukrainians fleeing westward, clogging major highways and railway lines.
"We have withstood and are successfully repelling enemy attacks. The fighting goes on," Zelenskiy said in a video message from the streets of Kyiv posted on his social media.
Russian President Vladimir Putin launched what xjmtzywhe called a special military operation before dawn on Thursday, ignoring Western warnings and saying the "neo-Nazis" ruling Ukraine threatened Russia's security.
On Saturday, the Kremlin said its troops were advancing again after Putin ordered a pause on Friday.
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Russia's assault is the biggest on a European state since the Second World War and threatens to upend the continent's post-Cold War order.
The crisis has galvanized the NATO military alliance, which has announced a series of moves to reinforce its eastern flank. While NATO has said it will not deploy troops to Ukraine, a string of member countries are sending military aid.
U.S. President Joe Biden approved the release of up to $350 million US worth of weapons from U.S. stocks, while Germany, in a shift from its long-standing policy of not exporting weapons to war zones, said it would send anti-tank weapons and surface-to-air missiles.
European Union foreign policy chief Josep Borrell said the bloc's foreign ministers would meet on Sunday evening to discuss emergency assistance for Ukraine's armed forces.
Kyiv 'nearly encircled'
Ukraine, a democratic nation of 44 million people, won independence from Moscow in 1991 after the fall of the Soviet Union and wants to join NATO and the EU — goals Russia opposes.
Putin has said he must eliminate what he calls a serious threat to Russia from its smaller neighbour, accusing it of genocide against Russian-speakers in Eastern Ukraine — a charge dismissed by Kyiv and its Western allies as baseless propaganda.
The United States has observed more than 250 launches of Russian missiles, mostly short-range, at Ukrainian targets, a U.S. defence official said.
A Ukrainian presidential adviser said about 3,500 Russian soldiers had been killed or wounded and that Russian troops had not made serious gains on the third day of fighting. Western officials have also said intelligence showed Russia suffering higher casualties than expected and its advance slowing.
Russia has not released casualty figures and it was impossible to verify tolls or the precise picture on the ground.
"We know that [Russian forces] have not made the progress that they wanted to make, particularly in the north. They have been frustrated by what they have seen is a very determined resistance," the Ukrainian official said, without providing evidence.
Chechen leader Ramzan Kadyrov, a close Putin ally, said Saturday his fighters were also deployed in Ukraine. He said Russian forces could easily take Kyiv and other large cities but their task was to avoid loss of life.
Kyiv Mayor Vitali Klitschko said there was no major Russian military presence in the capital, but that saboteur groups were active. The metro system was being used as a shelter for citizens and trains have stopped running, he said.
Klitschko, a former world heavyweight boxing champion, later told Germany's Bild tabloid the city was "nearly encircled."
Curfew in force as fighting intensifies in Ukraine after Russian invasion
4 hours agoDuration 10:20A curfew has been imposed in Kyiv until Monday morning, as thousands of Ukranians flee by car and foot to escape Russia's invasion. 10:20
Authorities have handed thousands of assault rifles to residents and told citizens to make petrol bombs to help repel the invaders.
Ukrainians faced lengthy queues for money at cash machines and for fuel at petrol stations, where individual sales are mostly limited to 20 litres. Many shops in Kyiv's city centre were closed and the streets were largely empty on Saturday afternoon.
"I was smart enough to stock up food for at least a month," said one resident, Serhiy, out for a walk before the curfew. "I did not trust the politicians that this would end peacefully."
At least 198 Ukrainians, including three children, have been killed and 1,115 people wounded so far in Russia's invasion, Interfax quoted Ukraine's Health Ministry as saying. It was unclear whether the numbers comprised only civilian casualties.
Interfax later cited the regional administration in Donetsk, in Eastern Ukraine, as saying 17 civilians had been killed and 73 wounded by Russian shelling.
Moscow says it is taking care not to hit civilian sites.
Refugees, sanctions and protests
Russia's Defence Ministry said its forces had captured Melitopol, a city of 150,000 in southeastern Ukraine. Ukrainian officials did not comment and Britain cast doubt on the report.
If confirmed, it would be the first significant population centre the Russians have seized.
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The city of Mariupol, a key port on the Sea of Azov in southeast Ukraine, remained under relentless shelling on Saturday, its mayor, Vadim Boychenko, said in a televised address.
"They are shelling schools, apartment blocks," he said.
About 100,000 people have crossed into Poland from Ukraine since Thursday, including 9,000 who have entered since 7 a.m. on Saturday, Polish Deputy Interior Minister Pawel Szefernaker said.
"The most important thing is that people survive," said Katharina Asselborn, wiping away tears while waiting at the Polish border for her sister, aunt and her three children to arrive from their home in Ukraine's Black Sea port of Odesa.
"The last 30 kilometres to the border, they went on foot."
Heavy traffic at Polish-Ukrainian border crossing as tens of thousands flee
7 hours agoDuration 1:39CBC's Susan Ormiston reports from Poland's Medyka crossing, located on the border with Ukraine, as people fled by car and on foot to escape Russia's invasion. 1:39
Ukrainians were also crossing the borders into Hungary, Romania and Slovakia.
Western nations have also announced new sanctions on Russia, including moving to block Russia's access to the SWIFT international payment system.
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Several European countries, including Russia's Baltic neighbours, Lithuania and Latvia, said they were closing their airspace to Russian airliners.
Protests against the war took place in Berlin, Berne, London, Tokyo, Sydney and other cities worldwide.
Abramov Kiril, a 33-year-old Ukrainian living in Romania who still has grandparents in southern Ukraine, was among around 1,000 people demonstrating against Putin's move outside the Russian Embassy in Bucharest.
"If they will not stop him in Ukraine, he will go forward," he said. "Somehow, together, with everybody, with all the countries in Europe and … all the world, we need to stop him."
