Ukraine's capital Kyiv is under attack from Russian missile strikes.
Russian forces are trying to break through the city's defences but have so far failed.
The invasion has so far killed 198 Ukrainians, the health minister says.
Ukraine’s president remains defiant, saying: ‘We won't lay down our arms’
Russia says it has captured the city of Melitopol in the south.
The UK says it and 25 other nations will send more weapons and aid to Ukraine.
Poland calls off their 2022 World Cup play-off with Russia in Moscow next month.
The UN estimates that 100,000 people have escaped Ukraine in the past 48 hours.
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