Here are the latest developments in the conflict between Russia and Ukraine:
Putin announces 'operation'
Russian President Vladimir Putin announces the attack on Ukraine shortly before 0300 GMT (around noon Thursday in Manila).
He says the military operation is to defend separatists in the east from "genocide" and warns the West of "horrible consequences" if it interferes.
As airstrikes and artillery pummel the country, Ukraine's Foreign Minister Dmytro Kuleba accuses Putin of launching a "full-scale invasion".
Russians close on Kyiv
Russian ground forces cross into Ukraine from several directions. They break through into the region north of Kyiv, attacking Ukrainian positions with Grad missiles.
Battle for airbase
An airbase on the northern outskirts of Kyiv falls to the Russians after dozens of attack helicopters take part in the assault.
Russia controls skies
Russia has "eliminated" Ukraine's air defenses and has complete air superiority but Ukraine is putting up stiff resistance, according to a senior Western intelligence officer.
'Massive casualty numbers'
With dozens dead, including many civilians, the Red Cross says it fears "massive casualty numbers".
Airbases, defences 'destroyed'
Russia says its forces have destroyed more than 70 military targets, including 11 airfields in Ukraine.
The Russian army says Moscow-backed separatist forces in eastern Ukraine are advancing and gaining territory.
'Crime against humanity'
The Polish chairman of the Organization for Security and Cooperation Europe, which includes Russia, accuses Moscow of a "crime against humanity" in invading Ukraine.
The Russians intend to decapitate the Ukraine's government and install a new leadership allied to Moscow, a senior U.S. defense official claims.
Beijing tells Russia's foreign minister it understands Moscow's "reasonable concerns on security issues" in Ukraine.
Polish refugee centers
Poland is opening nine reception centres along its border with Ukraine to prepare for an influx of refugees.
'Ban Russia from banking system'
Ukraine calls on Russian banks to be excluded from the international SWIFT financial transfer network, as the West considers how to ramp up sanctions on Moscow.
Severe US sanctions...
U.S. President Joe Biden announces severe new sanctions on Russia including freezing assets of major banks and cutting off high-tech exports to the country. He says excluding Moscow from SWIFT is also an "option".
...But no troops
Biden says he will send no U.S. troops but will "defend every inch of NATO territory."
Belarus 'not taking part'
Dictator Alexander Lukashenko says his military is not taking part in the invasion, but Europe hints at punishing Belarus ror its role as a launchpad for the invasion, as Washington sanctions 24 individuals and organisations from the country.
Moscow arrests anti-war protesters
More than 1,400 Russian anti-war protesters are arrested in Moscow and St Petersburg as they brave warnings that they would be prosecuted if they took to the streets.
Olympics blast Russia
The International Olympic Committee harshly criticise Russia for violating the "Olympic Truce" for the Beijing Winter Games.
EU and NATO member Lithuania -- the nearest of the Baltic states to Ukraine -- says it will impose a state of emergency after the Russian attack.
Oil prices soar
Oil prices soar past $105 for the first time in more than seven years after Putin announces the invasion.
Record wheat prices
European wheat prices also hit a record high with Ukraine one of the world's biggest grain producers.
European stocks slump
European stocks slump after similar falls in Asia, with the London market dropping three percent.