At least 26 people are believed to have been killed after Russian forces struck a humanitarian aid centre in Ukraine.
The strikes hit Komyshuvakha, a village in the southern Zaporizhzhia region. Two rescue workers were among those reported dead.
Ukrainian President Volodymyr Zelenskyy said on X that 10 guided bombs hit an area containing a school being used to distribute aid, as well as a nearby underground shelter.
Mr Zelenskyy described the attack as “further proof that Russia wants no de-escalation” and said the death toll had reached 26.
The bombing came as a limited ceasefire expired on Monday in Kherson, another region in southern Ukraine. The agreement had enabled humanitarian aid deliveries and evacuation operations in front-line areas of Russian-occupied territory.
“There was a moment when the next steps could have shown that progress toward peace was possible,” Mr Zelenskyy said. “With these killings, Russia is sending an entirely opposite signal: Russia is counting on more killings.”
Some of those killed were reportedly collecting aid at a local school. The acting regional governor also put the number of dead at 26 or more.
Emergency crews searched the rubble of collapsed buildings overnight in Komyshuvakha, using flashlights, according to photographs and video released online by local officials.
Residents stand at the site of an underground shelter in a compound of a local school which was used as a humanitarian aid hub and was hit by a Russian air strike
Rescuers carry the body of a person killed by a Russian airstrike inside an underground shelter at a compound in Komyshuvakha
Acting regional governor Mykhailo Semikin said on Telegram that those killed included “two rescue workers and four police officers”.
The emergency service identified the two rescuers as Denys Konovalenko and Oleksy Sushchevsky, both aged 44.
“Every day they went out to help people, working in dangerous conditions and risking their own lives to save others,” the service said.
Mr Zelenskyy said that after the Oleshky truce, “there was a moment when the next steps could have shown that progress toward peace was possible”.
“With these killings, Russia is sending an entirely opposite signal: Russia is counting on more killings. There must be a response to this,” he said.
Authorities in other parts of Ukraine reported a series of Russian drone strikes that left at least 17 people injured.
Earlier, residents in Ukraine and Russia received fraudulent emergency alerts after government-operated mobile applications were hacked, officials in both countries said. In Ukraine, one of the fake messages warned of an imminent nuclear threat.
It was unclear whether the cyber incidents, reported late on Sunday in Ukraine and early Monday in Russia, were connected. Ukraine said its mobile application, used by residents seeking warnings about Russian missile and drone attacks, had resumed operations after a temporary suspension. Russian officials said work to restore their emergency alert app was continuing.
A Russian Telegram channel linked to the country’s security services reported on Monday that a hacking group called Hitcore had claimed responsibility for breaching Ukraine’s emergency alert system. The alleged hackers’ identities, affiliations and motives remain unknown.
The messages sent to Ukrainians falsely claimed that radiation levels were dangerously high and warned of a chemical threat and public unrest in Kyiv. They appeared in English, Russian and Ukrainian, while the English versions contained spelling and grammatical mistakes.
One Russian-language message read: “Hi! There will be a nuclear threat across Ukraine. Do not worry, the Oreshnik is incoming,” referring to a Russian ballistic missile.
There was little evidence that the fake warnings caused widespread panic. Instead, social media filled with jokes, including pictures of relaxed pets and artificial intelligence-generated images inspired by an apocalypse. One image of Kyiv Mayor Vitali Klitschko, a former international kickboxing champion, carried the caption: “It’s a good thing we have a boxer for a mayor.”
Ukraine’s air raid alert channel said late on Sunday that “unauthorized parties” had disrupted the application and urged users not to open links contained in “suspicious notifications”.
Smoke rises over an underground shelter at a compound of a local school, which was used as a humanitarian aid hub and was hit by a Russian airstrike
Ukraine’s state-run Center for Countering Disinformation advised people to follow other official emergency channels on social media while the cyberattack was being dealt with.
Air force commander Anatolii Kryvonozhko told television that the breach had not affected Ukraine’s security or defence operations.
Russia’s Emergency Situations Ministry said hackers transmitted a false warning through its application at about 2.45am Moscow time on Monday across 33 of the country’s 89 regions. The ministry did not identify those it believed were behind the incident.
Officials said the vulnerability exploited by the attackers had been found and that “necessary measures” were being taken to prevent another breach. The ministry also said Russia’s broader warning network remained operational through text messages, broadcasts, municipal sirens and loudspeakers.
Kremlin spokesman Dmitry Peskov said Russian state institutions faced a constant cyber threat, including an increasing number of attacks involving artificial intelligence.
“All government bodies must take steps to improve the cybersecurity of our digital resources,” Mr Peskov said.
As the limited ceasefire in Ukraine’s Kherson region ended on Monday, Ukraine’s general staff said Russian forces had used the pause to strengthen drone defences and replenish ammunition.
The truce began on October 27 as part of a humanitarian aid and evacuation operation in the Russian-occupied city of Oleshky. It was the most significant pause in fighting between Kyiv and Moscow since Russia launched its full-scale invasion nearly five years ago.
Speaking to reporters in Kyiv on Monday, before the deadly strikes in Zaporizhzhia, Ukraine’s ombudsman and lead civilian negotiator for the operation, Dmytro Lubinets, said he hoped the local ceasefire and evacuation effort could serve as a “model” for similar missions.
In the eastern Kharkiv region, emergency officials said drone strikes wounded 12 people and damaged a refrigeration facility, greenhouses and residential buildings.
Five more people were reportedly injured in the Black Sea port of Odesa, where a warehouse was hit and homes sustained damage.
Russia’s Defence Ministry said it had shot down 212 Ukrainian drones overnight. Vyacheslav Fedorishchev, governor of the Samara region, said local air defences were responding to an aerial attack but provided no further details.
Independent Russian media later reported that Ukrainian drones had targeted one of Europe’s largest oil transport hubs in Samara.
