Missiles have struck near Ukraine’s southern port of Odessa, with Russia saying it had destroyed an oil refinery used by the Ukrainian military, while attempts to evacuate people from the devastated city of Mariupol are due to continue.
There was little sign of a breakthrough in efforts to negotiate an end to the five-week war, although Russia’s chief negotiator said talks were due to resume on Monday.
In Odessa, the city council said “critical infrastructure facilities” were hit by missiles.
No casualties were reported.
Russia’s defence ministry said strikes by its military had destroyed an oil refinery and three fuel storage facilities.
It said the facilities were used to supply Ukrainian troops near the city of Mykolaiv.
Odessa, on the Black Sea, is the main base for Ukraine’s navy.
It has been targeted by Russian forces seeking a land corridor to Transdniestria, a Russian-speaking breakaway province of Moldova which hosts Russian troops.
“Smoke is visible in some areas of the city. All relevant systems and structures are working … No casualties reported,” Vladyslav Nazarov, an officer of Ukraine’s South Operational Command, said on Telegram.
Evacuation efforts in Mariupol and nearby Berdyansk, both also on Ukraine’s southern shores, were due to continue with a convoy of buses being prepared for the operation with help from the Red Cross.
Mariupol is Russia’s main target in Ukraine’s south-eastern region of Donbas, and tens of thousands of civilians there are trapped with scant access to food and water.
Russia’s chief negotiator Vladimir Medinsky said a draft deal was not ready for any meeting between Russian President Vladimir Putin and Ukraine’s leader Volodymyr Zelenskiy.
On Saturday, Ukrainian negotiator David Arakhamia had raised hope for negotiations, saying enough progress had been made for direct talks.
Mr Medinsky said that while Ukraine was showing more realism by agreeing to be neutral, renouncing nuclear weapons, not joining a military bloc and refusing to host military bases, there had been no progress on other key Russian demands.
“I repeat again and again: Russia’s position on Crimea and Donbas remains unchanged,” he said on Telegram, adding talks via videoconference would continue on Monday.
Russia annexed Crimea from Ukraine in 2014 and has recognised declarations of independence by the self-proclaimed republics of Luhansk and Donetsk in the Donbas area of eastern Ukraine which rose up against Kyiv’s rule.
Ukraine said on Saturday its forces had retaken all areas around Kyiv, claiming complete control of the capital region for the first time since Russia launched its invasion on February 24.
There was no Russian comment on the claim, which Reuters could not immediately verify.
The mayor of Bucha, a liberated town 37 kilometres north-west of the capital, said 300 residents had been killed during a month-long occupation by the Russian army, and victims were seen in a mass grave and still lying on the streets.
The Kremlin and the Russian defence ministry in Moscow did not immediately reply to requests for comment when asked about the bodies.
Moscow denies targeting civilians and rejects war crimes allegations.
Among those killed near Kyiv was Maksim Levin, a Ukrainian photographer and videographer who was working for a news website.
British Foreign Secretary Liz Truss said she was appalled by atrocities in Bucha and voiced support for the International Criminal Court’s inquiry into potential war crimes.
Ukraine’s emergency service said more than 1500 explosives had been found in one day during a search of the village of Dmytrivka, west of the capital.
Zelenskiy warned in a video address: “They are mining all this territory. Houses are mined, equipment is mined, even the bodies of dead people”. He did not cite evidence.
British military intelligence said Russian naval forces were maintaining a blockade along the Black Sea and the Sea of Azov, but the option of amphibious landings were becoming increasingly high-risk for Russia.
The British said reported mines, the origin of which remained unclear and disputed, posed a serious risk to shipping in the Black Sea.