A Russian attack on Ukraine's southern region of Odesa sparked fires at port and energy infrastructure facilities, emergency services said on Monday.

The attack damaged port equipment and several civilian vessels moored at the berths, deputy prime minister for Restoration Oleksii Kuleba wrote on Telegram.

"One of the ports is experiencing power outages, and specialists are already working to restore power," he said.

The attack on the region cut power to 36,500 households, Ukraine's private energy firm DTEK said on Monday. Some 32,500 households remained without power as of the morning.

DTEK reported significant damage to its facilities following the overnight attack in a post on the Telegram messaging app.

Russian air defence forces destroyed 36 Ukrainian drones over seven Russian regions overnight on Monday, the defence ministry said.

Denis Pushilin, the top Russian-backed official in Donetsk, said an attack by Ukrainian strike drones on energy infrastructure had left roughly 500,000 people without power across several districts. Work was continuing to restore the electricity supply, Pushilin wrote on Telegram.

The governor of the Ulyanovsk region east of Moscow said an attack by a Ukrainian drone on a substation there had been repelled. There were no casualties and the power supply was unaffected, Alexei Russkikh wrote on Telegram.

The ministry confirmed that three manufacturers have already commenced production, with a further eleven preparing to establish their own production lines.

Russian attacks on Ukraine’s Odesa region overnight ignited fires at energy and port infrastructure facilities, the country’s emergency services said on Monday.

Fire crews were deployed to contain the blazes, and assessments of the damage are under way.

No further details were immediately provided.

A Russian missile strike on the eastern Ukrainian city of Balakliia killed three people, with three teenagers among the 10 wounded, Kharkiv regional officials said on Monday.

The overnight attack damaged multi-storey residence blocks and destroyed scores of cars in the city centre, Oleh Synehubov, the governor of the region bordering Russia, said on the Telegram messaging app.

A photograph provided by regional authorities showed the damaged facade of a multi-storey brick building with windows blown out, as flames burned on an upper floor and debris and broken tree branches littered the area.

The teenagers were among the injured, Vitali Karabanov, head of Balakliia's military administration, said on Telegram, while nine of the injured were admitted to hospital.

Moscow made no immediate comment on the attack. Reuters could not independently verify Karabanov's comments.

Russia has rained down regular missile, drone and artillery strikes on Ukraine's second-largest city of Kharkiv, smashing homes and infrastructure, severing power links and subjecting residents to constant air-raid alerts.

Both sides deny targeting civilians in the war that Russia launched nearly four years ago, but thousands have been killed in the conflict, the vast majority of them Ukrainian.

Parts of the region, and the city of Izyum in its south, had no power supply overnight, after Russia's attacks late on Sunday injured a 14-year-old, city authorities said on Telegram.

Greece has agreed to supply US-origin liquefied natural gas to Ukraine as the country struggles with widespread damage to its energy infrastructure from Russian strikes. The deal was signed on Sunday as president Volodymyr Zelensky began a European tour in Athens aimed at bolstering Ukraine’s defences and securing energy support ahead of winter.

Running from December until March 2026, the agreement is “an essential step in strengthening regional energy cooperation and European energy security,” Zelensky and Greek prime minister Kyriakos Mitsotakis said in a joint statement. It will help “support Ukraine in the midst of a difficult winter,” they added.

The announcement came as Russian drone attacks overnight damaged energy facilities in the Odesa region, including a solar power plant, according to Ukraine’s State Emergency Service.

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Communications between Russia and the United States are ongoing, including discussions related to a possible settlement in Ukraine, Kremlin aide Yury Ushakov said on Monday.

“Communications continue,” Ushakov told reporters. “We are proactively talking on the settlement in Ukraine.”

He added that any agreement for a meeting between the Russian and US presidents would help push aside “many technical and political difficulties”.

“If an agreement in principle is reached between Washington and Moscow on a meeting between the leaders, then many issues will move to the background,” he said.

Russia's air defence forces destroyed 36 Ukrainian drones overnight, RIA news agency reported on Monday, citing the Russian defence ministry's daily data.

Finland’s president Alexander Stubb has said he is not very optimistic about the prospects of a ceasefire between Russia and Ukraine this year.

Europe, meanwhile, will require ''sisu," a Finnish word meaning endurance, resilience and grit, to get through the winter months, he said, as Russia continues its hybrid attacks and information war across the continent.

Finland, which shares a 1,340-km border with Russia and joined Nato after Moscow’s full-scale invasion in 2022, sees itself as a key bridge between Washington and Kyiv.

Stubb, who maintains a close relationship with Donald Trump, told Associated Press he uses those channels to explain Finland’s wartime experience and the realities on the battlefield.

"I can explain to President Trump what Finland went through or how I see the situation on the battlefield, or how do you deal with (Russian president Vladimir) Putin? And then, you know, if he accepts one out of 10 ideas, that's good," he said.

Speaking at a military training base near Helsinki, where volunteers were practising battlefield evacuations in freezing temperatures, Stubb said president Volodymyr Zelensky must act swiftly on corruption allegations that could undermine international support.

“I’m not very optimistic about achieving a ceasefire or the beginning of peace negotiations this year,” Stubb said, adding that progress by March would be “good.”