Five people have died after Russia attacked a TV tower in Kyiv, hitting nearby broadcast facilities, Ukrainian officials say
It comes after Russia warned residents that it was preparing to hit targets in the Ukrainian capital
It said it was planning attacks on Kyiv technology centres, urging people to stay away
A huge convoy of Russian armoured vehicles continues to advance on the city
Freedom Square in central Kharkiv, Ukraine's second city, has been hit by a strike, killing at least 10 civilians
In its latest assessment, the Pentagon says Russian troops have not taken Kharkiv or Mariupol, but they have occupied nearby towns
UK PM Boris Johnson accuses Russia of "barbaric and indiscriminate" attacks
Russian President Vladimir Putin has thanked the country’s special forces, highlighting those who are "heroically fulfilling their military duty" in Ukraine.
In a televised address that was also published on the Kremlin website, Putin hailed their "impeccable service in the name of the people of Russia and our great motherland".
We'll have more lines from Putin's address soon.
The Russian military assault on Ukraine "could well be the beginning of the end" for President Vladimir Putin, UK Foreign Secretary Liz Truss has said.
Speaking to the Trevor Phillips programme on Sky News, Truss said "we are seeing strong and brave Ukrainian resistance" and the UK would "continue to supply them with weapons and economic support".
She said she believed Putin was "making a strategic mistake" given the damage western sanctions would do to the Russian economy.
But she suggested the war could drag on for "a number of years", adding: "This is not going to be - I fear - over quickly."
"I fear this conflict could be very very bloody," she said.
When asked about UK sanctions, Truss said she had "compiled a hit list of oligarchs" and suggested there would be "a rolling programme of sanctions".
The war in Ukraine will inflict an "economic cost" on the UK, she said. But, she said, the British people will understand the price we would pay if we don't stand up to Putin now.
Truss will be interviewed by Sophie Raworth on the BBC's Sunday Morning programme within the next few minutes.
Ukraine's President Volodymyr Zelensky is calling for Russia to be stripped of its voting rights at the UN Security Council - adding that Russia's criminal actions in Ukraine are verging on "genocide".
Russia (and before it the USSR) is one of five countries that since 1945 has been a permanent member of the UN Security Council, giving it powerful veto rights over any "substantive" resolutions being considered by the body.
On Friday Russia used its veto power to block a Security Council resolution condemning Moscow's aggression and demanding it withdraws from Ukraine.
The council, which was established after World War Two to avoid future conflicts and promote peace, has four other permanent members: the US, UK, France, and China.
Image source, AFPUN Security Council in New York debating Moscow's actions on Friday
Image source, Getty ImagesHere are some new figures on the number of Ukrainians who have fled to neighbouring countries.
Slovak authorities said in the 24 hours until 06:00 GMT on Saturday, some 10,000 people entered the country at their three crossings with Ukraine.
This is almost ten times the normal figure.
More than 43,000 Ukrainians have fled to Romania in the three days since Russia invaded, while more than 150,000 people have entered Poland.
Ukraine borders another four countries - Hungary and Moldova, where many thousands have also crossed, and Belarus and Russia.
Here's a video that shows Ukrainian residents stopping advancing Russian tanks by walking at them en masse.
It is understood the scene was filmed in Koryukivka, in Chernihiv region.
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Here's the latest defence intelligence from the UK's Ministry of Defence - saying Russia is advancing on Ukraine "from multiple axis", while meeting "stiff resistance" from the Ukrainian military.
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Ukraine: Oil depot hit and set ablaze near Kyiv
The fire prompted fears of toxic fumes and residents were warned to close their windows and stay indoors.
The Troyeshchyna suburb of Ukraine's capital have been targeted in a missile attack, according to Interfax news agency.
An adviser to Ukraine's interior minister called it “a senseless and merciless strike on the residential area of Kyiv, Troyeshchyna" in a post, external on the Telegram app.
Videos and images posted on social media - which have been verified by the BBC - appear to show smoke rising out of the courtyard of a residential building, surrounded by destroyed cars.
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Finland and Ireland have announced they too will close their airspace to Russian planes.
It is not yet known when the measures will take effect.
Finland shares a 1,300-kilometre (800-mile) border with Russia - meaning a main westbound route from Russia will be closed.
Other countries such as Bulgaria, the Czech Republic, Estonia, Germany, Poland and the UK, have already made similar decisions.
Moscow, for its part, has also banned planes from several countries from flying over its territory.
Several countries have already closed their airspace to Russian flights (map made before Finnish and Irish announcements)
Image source, Daniel Leal/AFPUkraine has been handing out weapons to civilians to defend Kyiv
The Ukrainian military has issued guidance to ordinary people in its civilian resistance movement.
"No matter whether you have weapons or ammunition or not, use all possible ways and means of fighting," it said.
People have been asked to:
Katie Prescott, Business correspondent
Excluding certain Russian banks from the Swift system used for trillions of dollars-worth of transactions will hit the economy hard - and in the words of the White House, it will make the country rely on "the telephone or a fax machine" to make payments.
This is only a slight exaggeration. There are workarounds to Swift but none which are as efficient.
Only one country has been cut out in the past - Iran - which resulted in it losing 30% of its foreign trade.
Picking certain Russian banks will ensure the sanctions have the maximum impact on Russia, while preventing too much impact on Europe.
European businesses will be able to continue to collect money owed, and buy Russian energy.
Other measures are equally powerful. Curbs on Russia's central bank will stop it using its currency to limit the effect of sanctions.
Russia has been building up a cushion of foreign currency to protect its banks, but this new measure will significantly decrease the reserves available.
The impact of these measures may take a while to show - but they do express an immediate intent from Western nations.
Image source, GoogleUkraine's Zmiinyi (Snake) Island is in the Black Sea
On Friday we reported how Ukraine was honouring 13 soldiers it said were killed while defending Zmiinyi (Snake) island from Russian attacks.
But new information suggests the unit may still be alive, according to a Facebook post yesterday , externalby Ukraine's State Border Guard Service.
"The SBGSU and the armed forces, like the whole of Ukraine, have received hope that all of Zmiinyi's defenders are alive," said the update.
The government agency says it's working to identify the soldiers based on information about their possible current location.
"We sincerely hope that the boys will return home as soon as possible, and the information received at the time of the attack on the death will not be confirmed."
Image source, Getty ImagesRussia says a delegation has arrived in Belarus - ostensibly for talks with Ukraine.
But Ukrainian President Volodymyr Zelensky has rejected the offer, saying talks in Minsk could have been possible if Russia had not attacked Ukraine from Belarusian territory.
However, he is leaving the door open to negotiations in other locations.
He said: "If there had been no aggressive action from your territory, we could talk in Minsk... other cities can be used as the venue for talks.
"Of course we want peace, we want to meet, we want the war to end. Warsaw, Bratislava, Budapest, Istanbul, Baku - we've offered them to the Russians.
"Any other city would suit us, too - in a country, from whose territory missiles are not launched at us. This is the only way negotiations can be honest and can really end the war."
Here's more on the Ukrainian president's appeal for overseas fighters to create a "foreign legion" in Ukraine (see 07:15 GMT post).
President Zelensky put a call-out on his social media accounts inviting anyone to come and fight "side-by-side" with Ukrainians.
The post reads: "The President of Ukraine Volodymyr Zelensky is addressing all citizens of the world, friends of Ukraine, peace and democracy.
"Anyone who wants to join the defence of Ukraine, Europe and the world can come and fight side by side with the Ukrainians against the Russian war criminals."
A more detailed post says foreign citizens are legally allowed to join Ukraine's defences, and that a separate division of fighters is being formed called "the International Legion for the Territorial Defence of Ukraine".
Ukraine's leader has previously stressed how the country has been left to defend itself on its own.
Western allies have sent arms and ammunition - but aren't putting boots on the ground. Ukraine is not part of the Nato defence alliance.
Ukraine's foreign ministry spokesman Oleg Nikolenko says their airforce has shot down a missile aimed at the capital Kyiv, by a plane that flew in from Russian ally Belarus.
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We have reports of more attacks on Ukrainian cities and infrastructure.
Russian forces have blocked Kherson and Berdyansk and delivered another missile strike on Ukraine's military infrastructure, the Russian defence ministry spokesman Igor Konashenkov says.
Ukraine had recaptured Kherson earlier in the week. The city is in the south of Ukraine, north-west of Crimea (see below map) while Berdyansk is a port city to the east of Crimea.
Konashenkov said the city of Henichesk and the Chornobayivka airfield near Kherson had also been taken under control.
According to him, the Russian military yesterday struck Ukraine's military infrastructure using air and sea-launched cruise missiles.
There's been an influx of reports and social media footage showing fighting in Bucha, a suburb just north-west of Kyiv.
The footage shows machine gunfire, reportedly from a Russian armoured vehicle, and several units of Russian troops moving through Bucha's streets. The BBC cannot verify it at this point of time.
However we have verified this Telegram video, external, showing a residential block that suffered damage from shelling.
A man can be heard saying: "Here's how things are in our neighbourhood, Bucha Quarter. Windows shattered. This is where a shell landed. No idea if anyone got killed."
Image source, TelegramKathy Long
BBC News, Kyiv
The Ukrainian capital is cold and quiet this morning. A strict curfew remains in place and the only people visible on the city’s streets are police, the military and armed volunteers.
But the blue and yellow national flag still flies on many of the ornate buildings that make up Kyiv’s skyline.
Across the city, thousands are still sheltering in underground car parks, metro stations and basements, waiting to assess the damage the darkness brought.
It will have been a cold, cramped and uncomfortable night for many underneath their homes, listening for the sounds of gunfire and thudding missiles, the uncertainty and fear growing.
It’s unlikely that the dawn will bring any relief as the city continues to brace for attack.
Smoke from shelling seen on the outskirts of Kyiv on Sunday morning
Image source, TelegramThe BBC has verified this Telegram video, external which shows Russian trucks driving into Kharkiv.
The woman taking the video can be heard saying: "These are Russian troops. Marked with the letter Z. Driving down Sapernaya Street. They've stopped in between houses. God."
As this map of Russian advances in the north and east of Ukraine shows, Kharkiv is very close to Russia.
The city, which has a population of around 1.5m, is around 30km from the border and 80km from the Russian city of Belgorod.
Ukrainian forces are fighting Russians on the streets of Kharkiv, local officials say.
