A Russian attack hit Ukraine's energy infrastructure, killing two people and prompting power cuts in several regions, Ukrainian authorities said.
Moscow has in recent months escalated attacks on energy infrastructure in Ukraine, damaging natural gas facilities which produce the main fuel for heating in the country.
Experts have said Ukraine risks heating outages ahead of the winter months.
"Russian strikes once again targeted people's everyday life. They deprived communities of power, water, and heating, destroyed critical infrastructure, and damaged railway networks," Foreign Minister Andriy Sybiga said.
Russia launched 458 drones and 45 missiles at Ukraine overnight, said the Ukrainian air force, adding that it had downed 406 drones and nine missiles.
A drone strike on the eastern city of Dnipro ripped through a nine-storey building, killing two people and wounding six, Ukrainian Prime Minister Yulia Svyrydenko said.
Attacks forced emergency power cuts and interrupted water supplies in the northern city of Kharkiv, where the mayor said there was a "noticeable shortage of electricity."
There was no electricity, water, and partial heating in Kremenchuk, in the eastern Poltava region, the administration said.
There were also significant train delays, Restoration Minister Oleksiy Kuleba said, accusing Russia of stepping out its attacks on locomotive depots.
"We are working to eliminate the consequences throughout the country. The focus is on the rapid restoration of heat, light and water," Ms Svyrydenko said.
'Technological disaster'
Russia has targeted Ukraine's power and heating grid throughout its almost four-year invasion, destroying a large part of the key civilian infrastructure.
Drones also hit energy infrastructure in Ukraine's southern Odesa late Friday, the region's governor Oleg Kiper said on Telegram.
"There was damage to an energy infrastructure facility," he said, reporting no dead or wounded.
Russia's defence ministry said it struck "enterprises of the Ukrainian military-industrial complex and gas and energy facilities that support their operation."
The attacks on energy infrastructure have raised concerns of heating outages in Ukraine as the war enters its fourth winter.
Kyiv's School of Economics estimated in a report that the attacks shut down half of Ukraine's natural gas production.
Ukraine's top energy expert, Oleksandr Kharchenko, told a media briefing Wednesday that if Kyiv's two power and heating plants went offline for more than three days when temperatures fall below -10C, the capital would face a "technological disaster".
Ukraine has in turn stepped up strikes on Russian oil depots and refineries in recent months, seeking to cut off Moscow's vital energy exports and trigger fuel shortages across the country.
Yesterday evening, drone attacks on energy infrastructure in southern Russia's Volgograd region caused power cuts there too, governor Andrei Botcharov said on Telegram.
Russia says house-to-house advance continues in Pokrovsk
Russia has said that its forces continued to advance in grinding battles around the key towns of Pokrovsk and Kupiansk, and had captured a tiny village in eastern Ukraine.
The Defence Ministry said on Telegram that its forces had taken Vovche, in the southeast corner of the Dnipropetrovsk region.
According to Ukrainian census data, the village's population was 13 people in 2001.
In the Donetsk region, Russia said it continued to gain ground in house-by-house fighting in the strategic town of Pokrovsk, as well as nearby Myrnohrad.
Russia, which refers to the towns by their Soviet-era names of Krasnoarmeisk and Dmitrov, has said they are both encircled.
The ministry also said its forces are making progress in Kupiansk, in the Kharkiv region, where it says Ukrainian units are also surrounded.
Ukraine has acknowledged that the situation in Pokrovsk, where the battle has raged for over a year, is difficult, but says it is fighting on in all three towns.
Reuters could not verify the battle reports.
DeepState, a Ukrainian-run open-source map of the front line, shows that Russia has advanced around Pokrovsk and Kupiansk, but has not cut off Ukrainian forces in either.
It comes after three Ukrainian drones hit an electricity substation in the northern Russian region of Vologda overnight, regional governor Georgy Filimonov said.
Damage to the substation is being assessed, but electrical supplies in the region, which is located north of Moscow and around 1,900 km from Ukraine, are continuing uninterrupted, Mr Filimonov said in a post on Telegram.
Separately, two people were wounded when a Ukrainian drone hit a residential building in the Russian city of Saratov, local governor Roman Busargin said in a statement on Telegram.
Saratov, an industrial city on the Volga river 625 km from the Ukrainian border, has been repeatedly struck by Ukrainian drones since Russia ordered tens of thousands of troops into its neighbour in February 2022.
The more sparsely populated Vologda region, by contrast, has not been a regular target of Ukrainian strikes.
In total, Russia's Defence Ministry said that it had downed 83 drones overnight, mostly over regions bordering Ukraine.
