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Ukraine is ready to resolve the issue of unblocking Mariupol and evacuating civilians through diplomacy and has proposed to hold a “special round” of negotiations with Russia in the besieged city, officials said.

Ukraine negotiator and presidential aide Mykhailo Podolyak responded late on Wednesday:

Yes. Without any conditions. We’re ready to hold a ‘special round of negotiations’ right in Mariupol.

One on one. Two on two. To save our guys, Azov, military, civilians, children, the living & the wounded. Everyone. Because they are ours. Because they are in my heart. Forever,” he tweeted.

Yes. Without any conditions. We’re ready to hold a “special round of negotiations” right in Mariupol. One on one. Two on two. To save our guys, Azov, military, civilians, children, the living & the wounded. Everyone. Because they are ours. Because they are in my heart. Forever.

Another key Ukrainian negotiator, David Arakhamia, said on Telegram that he and Podolyak “are ready to arrive in Mariupol to hold talks”.

Today, in a conversation with the city defenders, a proposal was put forward to hold direct negotiations, on site, on the evacuation of our military garrison.

For our part, we are ready to arrive for such negotiations at any time as soon as we receive confirmation from the Russian side.”

As yet another desperate attempt to evacuate civilians from Mariupol failed Wednesday, Ukrainian President Volodymyr Zelensky warned that “the situation in Mariupol is deteriorating” with thousands of troops and civilians stuck in the city.

Zelenskiy said his country is ready to resolve the issues in Mariupol but Russia has “not yet shown readiness to take such a step” during a meeting with media representatives after talks with President of the European Council Charles Michel in Kyiv.

“The situation in Mariupol is deteriorating. Unfortunately, so far we cannot achieve a positive result there. Our warriors have hundreds of wounded. Protecting ordinary civilians with their backs, they lose their lives. Because, as far as I know, there are about a thousand civilians behind our guys in Mariupol, including children and women,” Zelenskiy said.

Thank you for joining us for today’s coverage of the war in Ukraine.

This live blog is now closed, you can find our latest coverage of the Russia-Ukraine war in our new live blog.

Here are some of the latest images to come out of Ukraine today.

US President Joe Biden is set to announce plans on Thursday to send additional military aid to help Ukraine fight back against the Russian invasion, according to a US official.

The official, who was not authorised to comment publicly and spoke to the Associated Press on the condition of anonymity, said Biden will deliver a Thursday morning address at the White House detailing his plans to build on the roughly $2.6bn in military assistance the administration has already approved for Ukraine.

The new package is expected to be similar in size to the $800m package Biden announced last week.

It includes much needed heavy artillery and ammunition for Ukrainian forces in the escalating battle for the Donbas region of eastern Ukraine.

“I don’t know about you, but I’ve been to Ukraine a number of times before the war ... and I knew they were tough and proud but I tell you what: They’re tougher and more proud than I thought,” Biden told military commanders. “I’m amazed at what they’re doing with your help.”

Chinese President Xi Jinping has reiterated China’s opposition to unilateral sanctions and “long-arm jurisdiction,” and said that “de-coupling” and pressure tactics such as cutting off of supply chains will not work.

China has repeatedly criticised western sanctions, including those against Russia over its invasion of Ukraine, but has also been careful not to provide assistance to Moscow that could lead to sanctions being imposed on Beijing.

During a video speech to the annual Boao Forum for Asia gathering on the southern Chinese island of Hainan, Xi also said that efforts are needed to stabilise global supply chains, but also said China’s economy is resilient and that its long-term trend had not changed.

Today’s Guardian Today in Focus podcast asks: Can Russia succeed as a new chapter of war begins in Ukraine?

Ukraine’s army held off Putin’s forces and stopped a Russian takeover of Kyiv in the first phase of the war. But, as Luke Harding reports, Russia’s approach in this next stage looks very different

Now, Putin’s focus is largely on winning territory in the east of the country.

In terms of military might, Russia appears to hold the advantage. But in the messy, grinding weeks ahead, will its forces be able to sustain the resources and willpower necessary to grasp victory?

A senior Kyiv official accused the International Committee of the Red Cross of working “in concert” with Russia in Ukraine, a charge the organisation has denied.

Ombudswoman Lyudmyla Denisova decried ICRC’s announcement last month that it was planning to open a branch in Russia’s southern Rostov region to help Ukrainian refugees, who, Kyiv says, have been forcibly deported to Russia.

“The International Red Cross is not fulfilling its mandate, I am certain of that,” Denisova said on Ukrainian television Wednesday after meeting with the head of the ICRC’s Ukrainian branch, AFP reports.

Citing data from the United Nations, Denisova said that some 550,000 Ukrainians, including 121,000 children, have been taken to Russia during the course of the war, but Kyiv has no information on who these people are and where they are being kept.

“Where are they? In filtration camps? In temporary facilities?” Denisova asked.

The official said she had asked both her Russian counterpart Tatyana Moskalkova and the ICRC for help in getting information on these refugees so that Ukraine could facilitate their return home, but had received “zero answer from her or from the Red Cross”.

Asked by the TV anchor whether Denisova suspected that the Red Cross was working “in concert” with Russia, Denisova replied: “Yes, I suspect they are.”

The ICRC strongly rejected Kyiv’s accusations.

“The ICRC does not ever help organise or carry out forced evacuations. We would not support any operation that would go against people’s will and international law,” the organisation said in a statement to AFP.

It added: “Building and maintaining a dialogue with parties to a conflict is essential to get access to all people affected and obtain necessary security guarantees for our teams to deliver life-saving aid.”

The Red Cross said it has been exploring the possibility to open an office in southern Russia.

“Our sole objective is to alleviate the suffering of the people affected by the armed conflict. And the suffering right now is simply immense.”

Here is an inside look at a settlement for displaced people in Lviv, Ukraine.

Houses were provided by the Polish government.

“Here we can be just by ourselves, we have real beds, and it’s warm,” Viktoria, a 39-year-old kindergarten administrator, told AFP.

Polish Prime Minister Mateusz Morawiecki made a visit to the new settlement on Tuesday, saying it could welcome up to 350 people.

“There will be more of these villages. In Lviv alone, they will accommodate 5,000 people,” he said, adding that plans were afoot to build similar settlements in ravaged towns retaken from the Russians outside the capital Kyiv.

Russia controls 80% of territory in Luhansk, the head of the Luhansk regional military administration has said.

Serhiy Gaidai said in an update posted to his official Facebook account:

Yes, 80% of our territories are now controlled by [Russians]. Kremínna under [Russian control], Rubížne and Popasna. The fights are going on.”

Gaidai added that morgues and hospitals in the temporarily occupied territories are crowded.

“Luhansk land is full of corpses of enemies,” he said.

Germany will phase out Russian oil imports “by the end of the year” foreign minister Annalena Baerbock has said.

Speaking at a news conference in Riga with Baltic foreign ministers, Baerbock reiterated that coal imports would be phased out by the end of the summer. Gas imports would be phased out over a longer timeframe, she added.

I therefore say here clearly and unequivocally yes, Germany is also completely phasing out Russian energy imports.

We will halve oil by the summer and will be at 0 by the end of the year, and then gas will follow, in a joint European roadmap, because our joint exit, the complete exit of the European Union, is our common strength.”

G7 finance ministers said they have provided and pledged together additional support to Ukraine exceeding $24bn for 2022 and beyond, adding that they were prepared to do more as needed.

In a statement seen by Reuters, the ministers said they regretted Russia’s participation in international forums, including G20, International Monetary Fund and World Bank meetings this week.

“International organisations and multilateral fora should no longer conduct their activities with Russia in a business-as-usual manner,” the ministers said.

Imprisoned Russian opposition leader Alexei Navalny has also spoken out against far-right French presidential candidate Marine Le Pen’s alleged ties to Russia in a long Twitter thread late on Wednesday.

“This bank is a well-known money-laundering agency created at the instigation of Putin,” Navalny tweeted, without citing evidence other than his own investigations into corruption in Russia. “This is selling political influence to Putin.”

French President Emmanuel Macron has accused his far-right rival Marine Le Pen of being in thrall to Russian President Vladimir Putin over a years-old Russian bank loan to her party during a fiery debate ahead of Sunday’s election.

Macron’s strongest lines of attack were on a well-publicised loan to her party for its 2017 campaign contracted through a Russian bank.

“You depend on the Russian power, you depend on Mr. Putin,” Macron told his opponent.

“A lot of your choices can be explained by this dependence,” he said in an attack on Le Pen’s policy positions.

“You cannot defend the interests of France because your interests are linked to Russian powers,” Macron said. “In 2015 you took out a loan with a Russian bank and you still have not paid it back.”

Le Pen dismissed the charge of being compromised politically by the Russian bank loan.

“He knows I am a free woman, I am a patriot. I have always defended France and the French. Always and in all circumstances,” she said.

United Nations Secretary-General Antonio Guterres has separately asked Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskiy to receive him to discuss steps to bring about peace.

UN spokesman Stephane Dujarric said separate letters were handed to the permanent missions of Russia and Ukraine on Tuesday afternoon asking Putin to receive Guterres in Moscow and Zelenskiy to receive him in Kyiv, according to a Reuters report.

“The Secretary-General said, at this time of great peril and consequence, he would like to discuss urgent steps to bring about peace in Ukraine and the future of multilateralism based on the Charter of the United Nations and international law,” Dujarric said in a statement.

A senior US defence official said 14 US howitzers that Washington said last week would be provided to Ukraine were now being delivered to the region, along with ammunition for them.

Around 50 Ukrainians are being trained outside of Ukraine to operate them, the official said.

“They will get trained on how to use the howitzers and then they’ll be able to go back in to Ukraine and train their colleagues,” the official said.

The US defence department has retracted its claim that Ukraine had been supplied with more aircraft, instead saying only parts had been delivered to enable Kyiv to put more jets into the fight against Russia.

Pentagon spokesman John Kirby retracted his statement from Tuesday that Ukraine had received fighter jets from an unnamed ally.

While fixed-wing aircraft have been offered by an unidentified country to bolster Kyiv’s defences, “they have not received whole aircraft from another nation,” Kirby told reporters.

“I was mistaken. They have not received whole aircraft from another nation,” Kirby said of his Tuesday claim.

“That said, Ukrainians have received through United States coordination and provision enough spare parts and additional equipment such that they have been able to put in operation more fixed-wing aircraft in their fleet than they had even two to three weeks ago,” he said.

Separately, a senior US defence official said the parts supply has enabled Ukraine to add 20 previously inoperable jets to its active fighter fleet.

Five allied countries including the United States have warned that “evolving intelligence” indicates Russia is poised to launch powerful cyberattacks against rivals supporting Ukraine.

The members of the “Five Eyes” intelligence sharing network - the US, Britain, Canada, Australia and New Zealand - said Moscow could also involve existing cybercrime groups in launching attacks on governments, institutions and businesses, in a statement released on Wednesday.

“Evolving intelligence indicates that the Russian government is exploring options for potential cyberattacks,” they said in an official cyber threat alert.

Russia’s invasion of Ukraine could expose organisations both within and beyond the region to increased malicious cyber activity. This activity may occur as a response to the unprecedented economic costs imposed on Russia as well as materiel support provided by the United States and US allies and partners.

In addition, it said, “some cybercrime groups have recently publicly pledged support for the Russian government. “

“Some groups have also threatened to conduct cyber operations against countries and organisations providing materiel support to Ukraine,” it said.

Wednesday’s alert said Russian state-sponsored cyber actors have the ability to compromise IT networks, to steal large amounts of data from them while remaining hidden, to deploy destructive malware and to lock down networks with “distributed denial of service” attacks.

The alert identified more than a dozen hacking groups, both parts of Russian intelligence and military bodies and privately operated, which present threats.

It warned that infrastructure could be particularly targeted in countries Moscow might want to take action against.

US, Australian, Canadian, New Zealand, and UK cybersecurity authorities urge critical infrastructure network defenders to prepare for and mitigate potential cyber threats - including destructive malware, ransomware, DDoS attacks, and cyber espionage - by hardening their cyber defences and performing due diligence in identifying indicators of malicious activity,” the alert said.

US Cybersecurity and Infrastructure Security Agency Director Jen Easterly malicious cyber activity is “part of the Russian playbook”.

We also know that the Russian government is exploring options for potential cyberattacks against US critical infrastructure.”

“Russia has significant cyber capabilities and a demonstrated history of using them irresponsibly, and state-sponsored malicious cyber activity is a real risk to organisations around the world,” Sami Khoury, Head, Canadian Centre for Cyber Security, added.

Ramzan Kadyrov, the head of Russia’s republic of Chechnya, said Russian forces would be in complete control of the Azovstal steel plant in Mariupol on Thursday.

“Before lunchtime, or after lunch, Azovstal will be completely under the control of the forces of the Russian Federation,” he said in an audio message posted online early on Thursday as seen by Reuters.

Chechen forces have been fighting in Ukraine as part of Russia’s military operation.

Mariupol would be the biggest city to be seized by Russia since invading Ukraine eight weeks ago.