Very complex talks are underway to evacuate a large number of wounded soldiers from a besieged steelworks in the strategic southeastern port of Mariupol in return for the release of Russian prisoners of war, Ukraine's president said.
Mariupol, which has seen the heaviest fighting in nearly three months of war, is now in Russian hands but hundreds of Ukrainian defenders are still holding out at the Azovstal steelworks despite weeks of heavy Russian bombardment.
Fierce Ukrainian resistance, which analysts say Russian President Vladimir Putin and his generals failed to anticipate when they launched the invasion on Feb. 24, has slowed and in some places reversed Russian advances elsewhere in Ukraine too.
As well as losing large numbers of men and much military equipment, Russia is also reeling from economic sanctions. The Group of Seven leading Western economies pledged in a statement on Saturday to "further increase economic and political pressure on Russia" and to supply more weapons to Ukraine.
In a late night address, Ukranian President Volodymyr Zelenskiy addressed the plight of people trapped at the Azovstal site.
"At the moment very complex negotiations are under way on the next phase of the evacuation mission – the removal of the badly wounded, medics," he said, adding that "influential" international intermediaries were involved in the talks.
Russia, which initially insisted the defenders in the sprawling Soviet-era bunkers beneath the steel works give themselves up, has said little publicly about the talks.
Ukraine's Deputy Prime Minister Iryna Vereshchuk told local TV on Saturday that efforts were now focused on evacuating about 60 people, comprising the most seriously wounded as well as medical personnel.
The wife of one of the steel works defenders, Natalka Zarytska, appealed to Chinese President Xi Jinping at a briefing in Kyiv on Saturday to "show ... great concern for world values and great Eastern wisdom" and help end the siege of Azovstal.
Xi has aligned China with Russia, blaming the West for the war while calling for a diplomatic resolution of the crisis.
Many of those still in the plant are members of the Azov Regiment. Deputy commander Sviatoslav Palamar said his forces would continue to resist as long as they could.
"Our enemy, supported by planes and artillery ... continue their assault on our positions but we continue to repel them," he told an online forum on Friday streamed on YouTube.
Moscow's invasion, which it calls a "special operation" to disarm Ukraine and protect it from fascists, has jolted European security, prompting Finland - which shares a long border with Russia - and most likely Sweden to abandon their long-cherished military neutrality and seek NATO membership.
Russia's Deputy Foreign Minister Alexander Grushko, quoted by Russian news agencies on Saturday, said Moscow had no hostile intentions towards the two Nordic countries but that it would take "adequate precautionary measures" if NATO deployed nuclear forces and infrastructure closer to Russia's border.
Russian Su-27 fighter jets have taken part in drills to repel a mock air strike on Russia's Kaliningrad exclave on the Baltic Sea that borders Poland and Lithuania, Interfax news agency reported on Saturday, citing the Baltic Sea fleet.
German Chancellor Olaf Scholz, who spoke to Putin by phone on Friday, said he detected no sign of any change in the Russian leaders's thinking on the conflict.
In an interview for the t-online news website published on Saturday, Scholz also said Western sanctions on Russia would remain in place until it reached an agreement with Ukraine, adding: "Our aim is for this invasion to fail."
Meeting in Germany, foreign ministers from the G7 group of rich nations on Friday backed giving Ukraine more aid and arms.
In their statement on Saturday, the G7 ministers - from the United States, Japan, Germany, Britain, France, Italy and Canada - also pledged to "expedite our efforts to reduce and end reliance on Russian energy supplies".
BODIES PILED UP
Despite Ukrainian resistance, Russian forces have made steady gains in southern Ukraine and the eastern Donbas region.
"We are entering a new, long phase of the war," Ukrainian Defence Minister Oleksii Reznikov said in a Facebook post, predicting extremely tough weeks when Ukraine would largely be alone against an "enraged aggressor".
In its latest bulletin, Russia's defence ministry said its forces had hit Ukrainian command posts, ammunition depots and other military equipment in several regions, including the Donbas, killing at least 100 Ukrainian "nationalists".
Reuters could not independently verify the report.
In a grim illustration of the toll on Russia's own forces, Reuters footage on Friday showed the bodies of Russian soldiers being brought to a rail yard outside Kyiv and stacked with hundreds of others in a refrigerated train, waiting for the time when they can be sent back to their families.
"Most of them were brought from the Kyiv region, there are some from Chernihiv region and from some other regions too," Volodymyr Lyamzin, the chief civil-military liaison officer, told Reuters as stretcher-bearers in white, head-to-toe protective suits lifted body bags into the box cars.
He said refrigerated trains stationed in other regions across Ukraine were being used for the same grim purpose.
Moscow has imposed a military-civilian administration in Ukraine's southern Kherson region and plans to hold a referendum there on whether it wishes to join the Russian Federation, mirroring similar votes held in the adjacent Crimea peninsula in 2014 and in two Donbas regions.
Russia would almost certainly manipulate the results of such a vote, Britain's defence ministry said.
Ukrainian forces have driven their enemies away from the second largest city, Kharkiv, near the Russian border, but Moscow was still bombarding nearby villages, including Dergachi, some 10 km (six miles) north of Kharkiv.
"I can't call it anything but a terrorist act," Dergachi Mayor Vyacheslav Zadorenko told Reuters after missiles struck a building used to distribute aid.