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
And here is the standing ovation given to President Volodymyr Zelensky at that special session of the European Parliament.
He was appearing by videolink from Ukraine.
As we reported a little earlier, Ukraine's President Volodymyr Zelensky has been addressing the European Parliament via videolink.
Here's a bit more from his speech, in which he appealed for EU membership, and for which he received a standing ovation.
Image source, EPAQuote MessageThese last few days I don’t know any more how to greet people. I cannot say have a good day or have a good night, no, because for some this is their last day.
Quote MessageWe are having to face the harsh reality, people are dying every day. I think today those lives are being sacrificed for values, rights, freedom and equality that you benefit from.
Quote MessageThe European choice of Ukraine is the path on which we are engaging today. I would like to hear this message coming from you. I would like to hear that choosing Ukraine is also yours.
Quote MessageThe EU will be much stronger with us. We have shown our strength and that we are equals. On your side, you can prove to us that you are by our side, that you will not give up on us."
Volodymyr Zelensky
As the sixth day of Russia's invasion of Ukraine unfolds here's the latest:
More coverage:
'You're not coming to Kyiv because you're afraid' - woman tells Johnson in Warsaw
A little earlier, a Ukrainian woman from an organisation called The Anti-Corruption Action Centre confronted Boris Johnson at a news conference in Poland, demanding Western nations enforce a no-fly zone over the country.
A no-fly zone would mean Nato military forces engaging Russian air forces directly over the skies of Ukraine.
She accused Nato of being unwilling to do this out of fear of there being a third world war - but said this had "already started".
In response, Johnson said the crisis was "not something that the UK can fix by military means". Watch the exchange in the video above.
This map shows Freedom Square in central Kharkiv, which has been hit by a Russian strike.
An opera house, concert hall and government offices were hit.
The video below - which contains distressing images - captures the attack and subsequent explosion:
Building hit by missile in Kharkiv's Freedom Square
Image source, ReutersPhotos are emerging showing the damage caused by Russia's strike this morning on the centre of Ukraine's second-biggest city, Kharkiv.
According to emergency workers at least 10 people have been killed, and Ukrainian officials says dozens were injured.
In the picture above, we can see rescuers removing debris from the local administrative building that was hit. About a dozen people have been pulled from the rubble according to Ukraine's State Emergencies Service.
Russian missiles and rockets also hit an opera house and concert hall in the central Freedom Square.
Image source, SES of UkraineLocal State Emergency Service crew check through rubble following the attack
Image source, SES of UkraineKharkiv has been bombed heavily for days now
At least 10 people were killed and 20 injured after a missile strike on the central square of the eastern Ukrainian city of Kharkiv, reports say. Another dozen were rescued from under the rubble.
This information comes from the State Emergencies Service, as quoted by the Interfax-Ukraine news agency.
Image source, EU ParliamentUkraine's President Volodymyr Zelensky has just been addressing the European Parliament in their special session.
He says what is happening in his country is a tragedy and they are fighting for their land, their freedom and their lives. He said: "Nobody will break us, because we are Ukrainians."
He also says Russia has been targeting Ukrainian children, with 16 dying yesterday.
He calls for the Parliament to "prove you are together with us", prove they will not repel Ukraine and prove they are "real Europeans".
Zelensky, speaking over a video link, was given a standing ovation.
Image source, European Parliament
Image source, AFPThere have been emotional scenes at the opening of the EU parliament's special session debating the conflict in Ukraine just now.
It began with a standing ovation for the Ambassador of Ukraine, with MEPs taking to their feet and wearing t-shirts with the Ukrainian flag on.
The President of the European parliament, Roberta Metsola, thanked President Zelensky, who joined via video link.
"Mr President thank you for showing the world what it means to stand up. Thank you for reminding us about the dangers of complacency," she said in a speech, where she praised the heroism of the Ukrainian people defending their country.
Ms Metsola also said the parliament welcomes Ukraine's application to become an EU member, and would work on making that a reality.
Image source, ReutersMany Kyiv residents have remained defiant in spite of the advance of a huge convoy of Russian armoured vehicles, tanks and artillery. One woman, Olesia Sira, said she had decided to stay in the capital rather than flee abroad.
"Everybody is saying: 'We can help you. Don't worry. There is a place to stay. There's a car, there's a train.' But anything can happen to you on the way."
"I have heard that some people got shot while driving from Kyiv to the border. So we cannot risk doing that. There's a huge risk. I feel safest at my house or in the bomb shelter right next to me, rather than travelling somewhere I do not even know where I am going to sleep."
Olesia said she had also been encouraged by "how strong the army is... and how united the people are".
"Every single Ukrainian is willing to help in any way they possibly can... This makes me understand that we are stronger than ever as a country."
Sarah Rainsford
BBC Eastern Europe Correspondent, Dnipro
As the sirens wailed in the eastern city of Dnipro last night, we headed beneath ground into a nuclear bunker built in the Cold War. Decades later, it's sheltering hundreds of people in modern-day Ukraine as Vladimir Putin’s war escalates.
The bunker was originally for factory workers but the plant itself was abandoned long ago. Down a single flight of steps and beyond a thick metal door, the walls are plastered with instruction posters on how to wear a gas mask or protective suit.
Alongside a sign detailing "the lessons of Chernobyl", volunteers have piled biscuits, packs of tea and preserves around a Soviet TV.
The cave-like rooms, lined with heavy metal bunk beds, can take about 700 people.
Image source, ReutersWe're beginning to hear more about the civilian death toll across Ukraine.
It's hard to get an exact picture, and the BBC cannot verify every claim.
Earlier, emergency officials said that about 20 people had been injured in the strike on Kharkiv's administrative building and that six people had been recovered - we are unclear as to whether they were dead or alive.
Now the India's foreign minister has said an Indian student was killed in the strike on Kharkiv on Tuesday morning.
Dozens of civilian deaths were reported after Russia's bombardment of the city on Monday.
Ukraine's president has called the attack on the city a war crime, saying there were eyewitness accounts of civilians being deliberately targeted.
The UN has said some 136 civilians have been killed and 400 have been injured during the war., external
Image source, ReutersMaria Avdeeva, research director at the European Expert Association think tank, lives near the state administration office in Kharkiv that was hit by artillery fire on Tuesday.
She told the BBC that the building is located in a central square and is surrounded by universities, hotels and houses.
"This is a residential area with no military objects at all. Russian troops were deliberately targeting civilian objects."
Maria said the attack followed a night of relative calm that had given people a chance to sleep, after being forced to spend Monday hiding in basements or underground shelters to escape the Russian bombardment.
She even feared that Vladimir Putin might plan to blockade Kharkiv and begin "using civilians as hostages".
"There are 1.5 million people in Kharkiv and we are on the verge of a humanitarian crisis because we are lacking food supplies, medical supplies, all kinds of necessities," she said.
Ukraine's president says attacks on the eastern city of Kharkiv amount to state terrorism committed by Russia.
Addressing the European Parliament by videolink, external, Volodymyr Zelensky calls Russia's strike on central Kharkiv and the administration building a war crime and a conscious destruction of people.
"Evil, armed with rockets, bombs and artillery, must be stopped immediately. Destroyed economically. We must show that humanity is able to protect themselves," he says.
Earlier he posted a photograph which he said shows him signing an application for Ukraine's membership in the European Union.
Imogen Foulkes
BBC News, Geneva
Russia’s foreign minister, Sergei Lavrov, has told the UN Conference on Disarmament in Switzerland that it is time for US nuclear weapons in Europe to go home.
Lavrov was expected to appear in person in Geneva but travel bans prevented that - so in a pre-recorded message he said Russia was ready to talk about strategic stability with the US, but he warned that the West must not build military facilities in countries of the former Soviet Union.
He also appeared to offer a new justification of Russia's invasion in Ukraine – to prevent Ukraine acquiring nuclear weapons.
Led by Ukraine, many ambassadors, including those of the UK, Germany, Australia, Canada, the US, and the EU, walked out as Lavrov began to speak.
The Russia foreign minister is also due to speak again – once more by video link and probably pre-recorded – to the UN human rights council shortly.
Lyse Doucet
Chief International Correspondent, Kyiv
Image source, Getty ImagesMembers of a Ukrainian civil defence unit on Kyiv's northern front
The first day of March has swept in with an icy blast of wind and snow - and this sixth day of Russia's invasion is unfolding with a gnawing sense of foreboding.
Satellite images convey, with searing clarity, the pace of Russia’s progress towards Kyiv. A serpentine armoured convoy, some 40 miles (64 km) long, bristling with tanks and troops, slowly snakes forward. It's only 17 miles away.
It gives an entirely new, and terrifying, meaning to the expression "the world is watching". Everyone can see these satellite images but it's only Ukrainian forces, soldiers and civilians, that can stop its lumbering advance. Western militaries continue to send in weapons and ammunition, and incessant salvos of strong words. On the ground, Ukraine is on its own.
"We'll burn the convoy," a Ukrainian journalist vows when I meet him in a basement shelter. It's this raw resolve, and ardent patriotism, which has fired Ukraine's unexpectedly strong resistance to the mighty Russian army's advance.
News from the regional centre of Kherson in southern Ukraine, now encircled by Russian forces, sends a signal of what could lie in wait. It's a story of a gathering siege, the medieval tactic deployed to devastating effect time and again in Syria to starve a city into submission - it’s a war crime to do that.
With every day, the disbelief of six days ago turns into defiance and dread.
Sticking with the press conference in Poland, Boris Johnson adds that Vladimir Putin has underestimated the "passionate desire" of the Ukrainan people to defend their country.
He also praises the leadership and "courage" of Ukrainian President Volodymyr Zelensky, who he says has mobilised his country and the world amid the Russian invasion.
Putin, Johnson says, has also underestimated the "unity and resolve" of the West, saying it will keep up the "economic pressure" on Russia through sanctions.
He argues it is one of the most powerful sanctions packages against Russia - and indeed any country - in the last few years, and that it is clear it is having an effect.
The UK is "ready to intensify and keep going for as long as it takes", he adds.
Image source, EPAUK Prime Minister Boris Johnson has been holding a press conference in Warsaw with Polish Prime Minister Mateusz Morawiecki.
Johnson says the "tragedy" that the UK and others predicted has now come to pass with Vladimir Putin's invasion of Ukraine - and if anything it is worse than expected.
He calls it an unfolding disaster on the European continent, with Poland also on the frontline.
Johnson adds that "it is clear Putin is prepared to use barbaric and indiscriminate tactics against innocent civilians to bomb tower blocks, to send missiles into tower blocks to kill children".
Johnson has been in Poland and is meeting key European allies in Poland to discuss Russia's invasion of Ukraine.
Image source, ReutersEmergency officials in the city of Kharkiv say that at least 20 people have been injured during shelling of the state administration office there.
The BBC cannot independently verify these claims.
In a video posted to Facebook, an emergency worker outside the severely damaged building says that it has been partially destroyed, and adds that a stairwell in a nearby building has collapsed, trapping people beneath it.
The man says that some 20 civilians have been injured by the strike and six others recovered, though it is unclear whether he meant the people have been killed.
"The rescuers are sifting through the rubble, removing those injured and the bodies of those killed. Our work continues," the worker says.
Image source, ReutersWe've been bringing you pictures and updates on a huge explosion in Kharkiv, a place which has special significance for Ukrainians.
It is the country's second-largest city, and the first capital of the Ukrainian Soviet Socialist Republic set up by the Bolsheviks.
It is home to some of Ukraine's most important industry, including a tank factory, as well as numerous IT companies.
This morning, a missile struck its very heart in Freedom Square just outside the regional administration offices.
Speaking shortly after the attack, the head of the regional administration, Oleh Synehubov, called it a "treacherous war crime"., external
