President Zelensky has urged US President Biden and leaders of the other G7 industrialised countries for further support for Ukraine
The group met a day after Russia launched a wave of attacks on cities across the country in what is seen as an escalation of the war
There were further attacks today - in the western city of Lviv, energy facilities were hit, causing widespread power blackouts
The southern city of Zaporizhzhia was shelled again, and there were strikes on the central-eastern region of Dnipropetrovsk
People across Ukraine have been advised to stay in shelters, and not to ignore air raid sirens
Meanwhile, the UK's spy chief has said there are no current signs Russia is considering using nuclear weapons
We're now bringing our live coverage of the Ukraine war to a close for today. Thanks for joining us.
Today's live page was written by Adam Durbin, Emily McGarvey, Alys Davies, Laura Gozzi and Yaroslav Lukov. It was edited by Alex Therrien and Emma Owen.
Image source, Getty ImagesA residential building was destroyed as a result of a missile attack by Russian troops in Zaporizhzhia
We'll be closing our live coverage of the Ukraine war shortly. But before we do, here's a recap of the day's developments in Ukraine:
Image source, @ermaka2022Ukraine says 32 of its soldiers have been freed as part of a prisoner swap with Russia.
"All of them had been in places where fierce fighting was raging on. Many of these people had been considered missing," Andriy Yermak, the head of Ukraine's presidential office, tweeted, external.
He also revealed that the body of an Israeli citizen - named as Dmytro Fialka - was returned. He had volunteered to fight for Ukraine.
Russia has so far made no public comments on the reported swap.
Image source, ReutersThe situation around Ukraine's Zaporizhzhia nuclear power plant - Europe's biggest - is "of concern", Russian President Vladimir Putin told the head of the UN nuclear watchdog, Rafael Grossi.
Russia's state TV showed Putin meeting Grossi in St Petersburg, and saying he was "open for dialogue" on the issue.
He also told Grossi, who heads the International Atomic Energy Agency, that the world was currently witnessing "elements of the excessively dangerous politicisation of everything related to atomic activity".
Russian troops seized the Zaporizhzhia plant in early March, but have kept the station's Ukrainian staff.
Earlier on Tuesday, the facility's deputy director was kidnapped by the Russians, the authorities in Kyiv said.
The nuclear plant is located in the Russian-occupied part of the southern Zaporizhzhia region. It has been repeatedly shelled, with both Kyiv and Moscow blaming each other for such attacks.
Earlier this month, Putin declared the annexation of Zaporizhzhia and three other Ukrainian regions - a move condemned by Kyiv and its Western allies.
A former member of the Russian air force has told BBC News Vladimir Putin is afraid of mutiny from his generals.
Gleb Irisov, who fled the country, is also a former military correspondent for a Russian news agency and says he knows the new commander in charge of the war against Ukraine, Sergei Surovikin.
Speaking to Newshour, Irisov said Surovikin was appointed because of his “deep loyalty" to the Russian regime and president personally.
He added the Russian leader "is now afraid of some kind of mutiny from the generals".
Irisov said he began to oppose the government during his time in the military, observing the "neglect" his command showed towards people.
He described the war as a "catastrophe" for Ukraine and Russia that was dangerous for the world.
Irisov is pessimistic about the chance of change in his home country anytime soon, despite the "huge casualties and severe economic effects" of the war.
With parts of Ukraine hit by missile attacks once again today, here's some pictures showing what life has been like for some residents in the capital Kyiv and the south-eastern city of Zaporizhzhia - which was attacked by Russian missiles overnight.
Image source, ReutersPeople shelter underground at a metro station in Kyiv for a second day
Image source, Getty ImagesA carpet hangs off the side of a room in a residential building damaged by missile strikes in Zaporizhzhia
Image source, ReutersA woman stands inside her flat in central Kyiv, after it was hit by missile strikes on Monday
Image source, Getty ImagesA crater was left in Kyiv following a missile strike
Emily McGarvey
BBC News Live reporter
Image source, Getty ImagesThe debris of a Russian missile that struck a children's playground in the centre of Kyiv yesterday
Russia's decision to use some of its "dwindling stocks" of precision strike weapons against civilian targets rather than key military capabilities makes it less likely Russia will achieve its wider war aims, a senior research leader with think tank RAND Europe has said.
Bryden Spurling says while it is difficult to have a clear picture of what Russia has, all estimates "suggest that they’re much diminished".
The sanctions on Russia will make it increasingly tough for them to manufacture more weapons due to the difficulty it faces in sourcing key precision components, he says.
On mobilisation, Spurling says Russia's efforts may allow it to drag the war out for longer but that forces seem to have low morale, and are poorly equipped and trained.
“Its battlefield losses are unsustainable, and we’ve seen Russia drawing older and older equipment out of storage."
He says that if Western support remains in place, Ukrainian capability is likely to keep improving, whereas Russia’s is likely to only degrade further.
Image source, ReutersG7 leaders held a virtual meeting
The leaders of the G7 have condemned Russia's most recent missile attacks in Ukraine "in the strongest possible terms" and vowed to hold Russian President Vladimir Putin and those responsible to account.
They said "indiscriminate attacks on innocent civilian populations constitute a war crime" in a joint statement following their meeting with Ukrainian President Volodymyr Zelensky today.
The G7 firmly condemned and "unequivocally" rejected the illegal attempted annexation of Russian-occupied areas in Ukraine and reiterated it will never recognise this "illegal annexation or the sham referenda that Russia uses to justify it".
The G7 said it will continue to impose further economic sanctions on Russia, and reiterated its call on the Belarusian authorities to "stop enabling the Russian war of aggression".
"We will continue to provide financial, humanitarian, military, diplomatic and legal support and will stand firmly with Ukraine for as long as it takes," the joint statement added.
Image source, Ukraine's presidential officeMore now on the crisis meeting of G7 industrialised countries earlier on the war in Ukraine.
Ukrainian President Volodymyr Zelensky spoke at the virtual meeting and called for a price cap on Russia's oil and gas exports, arguing it would bring peace closer.
"They will encourage the terrorist state to think about peace, about the unprofitability of war," he said, speaking via a video link.
Russia's budget relies heavily on oil and gas revenues, and much of the funds are used to finance Moscow's invasion against Ukraine - launched on 24 February.
Zelensky said Russian President Vladimir Putin was still "a threat to all of us", after two days of widespread aerial strikes on cities across Ukraine.
"The Russian leader, who is now in the final stage of his reign, still has room for further escalation," he warned.
Zelensky also asked the G7 leaders to urgently provide advanced weaponry to create "air shield" for Ukraine and proposed to deploy an "international observers' mission" on the border between Ukraine and Belarus, a key ally of Russia.
The G7 (the Group of Seven) consists of the most-advanced economies and liberal democracies: Canada, France, Germany, Italy, Japan, the UK and the US.
President Volodymyr Zelensky has asked G7 leaders for more air defence weapons, and the mayor of the capital city Kyiv, Vitali Klitschko, has been making the same point.
”Air defence is our main priority and a couple of our big cities like Kharkiv and Lviv have been without water and electricity,” the former heavyweight boxing world champion told the BBC earlier, after Russian missile strikes hit critical infrastructure across the country for a second day.
“Yesterday was a massive attack to our home town [Kyiv] – the majority of rockets were shot down by Ukrainian forces but a couple of rockets destroyed our infrastructure and our buildings."
He says seven of the 19 people who died in yesterday’s missile strikes were killed in Kyiv, while 51 were injured and 42 are still in hospital.
“Russia says this is a special operation against military forces but rockets landed in children’s playgrounds in the middle of the city, close to our university. It’s destroying historical buildings and the Russians are trying to bring panic… but our people are ready to defend our country.”
Image source, .Ukraine has used the S-300 air defence systems to combat Russia's invasion
Image source, ReutersNato's Secretary General Jens Stoltenberg has been holding a news conference ahead of a meeting of the alliance in Brussels tomorrow.
He said Nato would step up its support for Ukraine "so that they [Ukrainians] can continue to defend themselves and liberate territories from Russian occupation."
"Ukraine has the momentum and continues to make significant gains, while Russia is increasingly resorting to horrific and indiscriminate attacks on civilians and critical infrastructure," he said.
"President Putin is failing in Ukraine," he added.
But he also warned that the Russian President's "attempted annexations, partial mobilisation and reckless nuclear rhetoric" represent the most significant escalation since the start of the war.
Image source, epaFrench President Emmanuel Macron attended the virtual meeting, which lasted two hours
We're told that the meeting of G7 leaders to discuss the Ukraine war has now finished.
A statement setting out what was discussed is expected to be released, and we'll bring you news of that as soon as we have it.
Ukraine's President Volodymyr Zelensky addressed the group, and said they must respond to Russia's bombing of his country's energy infrastructure with a price cap on oil and gas experts from Russia.
He's released a statement on the Telegram messaging app, saying there must be "zero profit for the terrorist state".
He also ruled out talks with Russian President Vladimir Putin.
A deputy head of the Russian-occupied Zaporizhzhia nuclear power plant has been kidnapped and detained by Russian forces, Ukraine’s state nuclear energy company Energoatom has said.
Valeriy Martynyuk, a deputy director general for human resources at the nuclear plant, was seized yesterday and is being detained in an unknown location, Energoatom said on the Telegram messaging app.
It said Russian kidnappers were “probably using methods of torture” on Martynyuk to try and get information about staff at the Zaporizhzhia plant “in order to force Ukrainian staff to work for Rosatom (the Russian state-owned nuclear power supplier) as soon as possible”.
Energatom appealed to the head of the International Atomic Energy Agency, Rafael Grossi, and world to “take all possible measures” for the immediate release of Martynyuk.
Most of the Zaporizhzhia region, including the nuclear plant, have been under Russian control since the early days of Russia's invasion in February but, the capital of the region, Zaporizhzhia city, remains under Ukrainian control.
Image source, ReutersThe nuclear plant is under Russian control
Image source, ReutersSmoke over power lines in Lviv after a Russian missile strike on Monday
Ukrainians have been urged to limit their electricity to help stabilise the country's power grid for a second day, after more Russian missile strikes left energy facilities badly damaged.
Writing on Telegram, Prime Minister Denys Shmyhal asked people to limit their power consumption at peak hours between 17:00 and 23:00 local time.
He asked them not to turn on energy-intensive appliances like ovens, kettles and electric heaters, adding it was essential for the "stable operation of our energy system".
Shmyhal also thanked Ukrainians for taking similar action yesterday, reporting that people dropped their energy use by an average of about 10% after the initial wave of Russian missile strikes.
He added scheduled power outages would be implemented in some regions.
Laying out the scale of the damage, Shmyhal said 3,900 towns, villages and other settlements were cut off yesterday - with just 100 of those still without power as it stands.
The death toll from Saturday's explosion on the Crimea bridge has risen to four people, reports the Russian state agency Tass.
The bridge is the longest in Europe and is a symbol of Russia's annexation of the peninsula from Ukraine in 2014.
Image source, ReutersWe have more now on the situation in Lviv, in western Ukraine.
Speaking to Radio 4's World at One, the city's deputy mayor says the last two mornings have been "very tough" with more than 15 missiles targeting the city.
"Yesterday we had troubles with electricity, water supply. But unfortunately this morning again we have more than four hours of alarms, and so also several Russian missiles target our city, and again critical infrastructure," Andriy Moskalenko says.
There are problems with water and electricity supplies once again today, he says.
He insists Russia is not targeting military infrastructure in the city because there is none there.
Image source, EPAMore now from the BBC's interview with the UK's spy chief Sir Jeremy Fleming on Russia's military strategy in Ukraine.
Fleming, the head of GCHQ, told the Today programme there were no current signs that Russia was considering the use of nuclear weapons in the Ukraine war but warned that any talk of nuclear weapons was "very dangerous".
GCHQ would hope to see "indicators" if Russia planned to use them, he said.
"Any talk of nuclear weapons is very dangerous and we need to be very careful of how we are talking about that," he said this morning.
In an address to the nation last month, Putin said his country had "various weapons of destruction" and would "use all the means available to us", adding: "I'm not bluffing."
"It's clear to me that whilst we might not like and in many ways abhor the ways the Russian military machine and President Putin are conducting this war, they are staying within the doctrine that we understand for their use, including for nuclear weapons," Fleming said.
Read the BBC Security correspondent Gordon Corera's full piece here.
Image source, Dnipropetrovska ODADnipro's Kalynova street after a Russian missile strike on Monday (left) and how it looks now
A major road bombed out in Ukraine's central-eastern city of Dnipro has been rebuilt overnight, local officials have said.
They have posted two pictures showing the Kalynova street just after a Russian missile strike on Monday and how it looks after major works on Tuesday.
"We worked all night with gritted teeth," Dnipro Mayor Borys Filatov says.
"We will restore everything and rebuild everything. But our hatred will live for centuries," he adds.
Russia has limited expectations of a virtual meeting of the G7 countries which is now under way, Kremlin spokesman Dmitry Peskov has said.
Peskov told reporters that "the mood of this summit is already obvious and predictable - the confrontation will continue".
Peskov also criticised US promises to supply advanced air defence systems to Ukraine, saying this would only extend the conflict and inflict more pain for Ukraine, according to Reuters, which reported on his comments.
Image source, Dnipropetrovska ODANew Russian missile strikes have caused serious damage to the energy infrastructure in Ukraine's central-eastern Dnipropetrovsk region, local officials say.
Many settlements in the Pavlohrad and Kamianske districts are now without electricity, Dnipropetrovsk regional head Valentyn Reznichenko says.
All emergency services have been deployed, he adds, warning that a "total electricity saving regime" is being introduced across the region so "that hospitals, transport and other important social infrastructure" can continue operating.