Here's what you need to know about the Ukraine crisis right now:
Russia's political and economic isolation deepened on Monday as its forces met stiff resistance in Ukraine's capital and other cities in the biggest assault on a European state since World War Two.
Blasts were heard in the capital of Kyiv and in the major city of Kharkiv on Monday morning, Ukrainian officials said, while a residential building in the city of Chernihiv in northern Ukraine was on fire after being struck by a missile.
Ukrainian and Russian officials were due to hold talks at a venue on the Belarusian border with Ukraine, President Volodymyr Zelenskiy's office said.
European nations and Canada moved to shut their airspace to Russian aircraft in an unprecedented move. Canada said Aeroflot violated a ban on aircraft from the country using Canadian airspace.
Crude oil jumped while the rouble plunged nearly 30% to a fresh record low after new sanctions were imposed, including blocking some banks from the SWIFT international payments system.
Energy major BP opened a new front in the West's campaign to isolate Russia's economy, with its decision to quit the oil-rich country the most aggressive move yet by a company in response to Moscow's invasion.
The European Union will fund weapons for Ukraine to help it defend itself against Russia's invasion, top EU officials said on Sunday. Russia calls its actions in Ukraine a "special operation".
Britain said it was taking further measures against the Russia in concert with the United States and European Union, prohibiting any British entities from undertaking transactions with the Russian central bank, finance ministry and wealth fund.
Russia's central bank announced a slew of measures to support domestic markets, as it scrambled to manage the fallout from the sanctions.
At least 352 civilians, including 14 children, had been killed since the beginning of Russia's invasion of Ukraine, Ukraine's health ministry said on Sunday, with 1,684 people wounded.
People fleeing Ukraine poured into central Europe, with queues at border crossings stretching for kilometres after the invasion pushed nearly 400,000 people to seek safety abroad.
Tens of thousands of people across Europe marched in protest against Russia's invasion of Ukraine on Sunday. More than 5,500 people have been detained at various anti-war protests in Russia since the invasion began.
Ukraine lodged a case against Russia at world court, citing erroneous allegations of genocide against Kyiv.