Russian troops began leaving the Chernobyl nuclear plant after soldiers got “significant doses” of radiation from digging trenches at the highly contaminated site, Ukraine’s state power company said.
Energoatom, the company, gave no immediate details on the condition of the troops or how many were affected.
But it said the Russians had dug in in the forest inside the exclusion zone around the now-closed plant, the site in 1986 of the world’s worst nuclear disaster.
The troops “panicked at the first sign of illness”, which “showed up very quickly,” and began to prepare to leave, Energoatom said.
There was no immediate comment from the Kremlin.
Its forces seized the Chernobyl site in the opening stages of the February 24 invasion, raising fears that they would cause damage or disruption that could spread radiation.
The workforce at the site oversees the safe storage of spent fuel rods and the concrete-entombed ruins of the exploded reactor.
The pullout came amid continued fighting and indications that the Kremlin is using talk of de-escalation as cover while regrouping and resupplying its forces and redeploying them for a stepped-up offensive in eastern Ukraine.
Ukrainian President Volodymyr Zelensky said Ukraine is seeing “a build-up of Russian forces for new strikes on the Donbas, and we are preparing for that”.
Meanwhile, a convoy of buses headed to Mariupol in another bid to evacuate people from the besieged port city after the Russian military agreed to a limited ceasefire in the area.
And a new round of talks aimed at stopping the fighting was scheduled for Friday.
The Red Cross said its teams were headed for Mariupol with medical supplies and other relief and hoped to take civilians out of the beleaguered city.
Tens of thousands have managed to get out of Mariupol in the past few weeks by way of humanitarian corridors, reducing the city’s population from a pre-war 430,000 to an estimated 100,000 as of last week, but other efforts have been thwarted by continued Russian attacks.
At the same time, Russian forces shelled Kyiv suburbs, two days after the Kremlin announced it would significantly scale back operations near both the capital and the northern city of Chernihiv to “increase mutual trust and create conditions for further negotiations”.
Britain’s Defence Ministry also reported “significant Russian shelling and missile strikes” around Chernihiv. The area’s governor, Viacheslav Chaus, said Russian troops were on the move but may not be withdrawing.
Russia’s military also reported new strikes on Ukrainian fuel stores late on Wednesday, and Ukrainian officials said there were artillery barrages in and around the north-eastern city of Kharkiv over the past day.
Despite the fighting raging in those areas, the Russian military said it committed to a ceasefire along the route from Mariupol to the Ukraine-held city of Zaporizhzhia.
Ukrainian Deputy Prime Minister Iryna Vereshchuk said 45 buses would be sent to collect civilians who have suffered some of the worst privations of the war.
Food, water and medical supplies have all run low during a weekslong blockade and bombardment of the city. Civilians who have managed to leave have typically done so using private cars, but the number of drivable vehicles left in the city has dwindled and fuel is low.
“It’s desperately important that this operation takes place,” the Red Cross said in a statement. “The lives of tens of thousands of people in Mariupol depend on it.”
Talks between Ukraine and Russia were set to resume on Friday by video, according to the head of the Ukrainian delegation, David Arakhamia, six weeks into a war that has seen thousands die and a staggering four million Ukrainians flee the country.
But there seemed little faith that the two sides would resolve the conflict any time soon, particularly after the Russian military’s attacks in zones where it had offered to dial back.
Russian President Vladimir Putin said that conditions were not yet “ripe” for a cease-fire in Ukraine and that he was not ready for a meeting with Mr Zelensky until negotiators do more work, Italian Premier Mario Draghi said in recounting a telephone conversation he had with the Russian leader on Wednesday.
Nato Secretary-General Jens Stoltenberg said alliance intelligence indicates that Russia is not scaling back its military operations in Ukraine but is instead trying to regroup, resupply its forces and reinforce its offensive in the Donbas.
“Russia has repeatedly lied about its intentions,” Mr Stoltenberg said. At the same time, he said, pressure is being kept up on Kyiv and other cities, and “we can expect additional offensive actions bringing even more suffering”.
The Donbas is the predominantly Russian-speaking industrial region where Moscow-backed separatists have been battling Ukrainian forces since 2014.
In the past few days, the Kremlin, in a seeming shift in its war aims, said that its “main goal” now is gaining control of the Donbas, which consists of the Donetsk and Luhansk regions, including Mariupol.
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