A Russian strike on an "invincibility point" that gives humanitarian support killed three people in an eastern Ukraine town, the emergencies service said on Friday.
The emergencies services published images of a one-storey building with its roof caved in and debris all around.
The invincibility point that was hit overnight in the city of Kostiantynivka in the eastern Donetsk region was one of many such shelters created by authorities across Ukraine to provide access to electricity, heating, water and other basic services.
Authorities said the victims included "three internally displaced women from Bakhmut, Chasiv Yar and Opytne" - nearby towns at the centre of the conflict.
Kostyantynivka is about 25 kilometres (15 miles) west of Bakhmut, an industrial city that has seen the longest and bloodiest battle of the Russian invasion.
The Kremlin on Friday said Russia will skip the annual global Earth Hour event this weekend after the World Wildlife Fund (WWF) was labelled a "foreign agent" by Moscow.
The move comes as Russia cracks down on most foreign-linked groups since its offensive in Ukraine, including climate-orientated organisations.
Earth Hour, which WWF organises, encourages people worldwide to turn their lights off for 60 minutes to raise awareness about environmental issues.
Russia has taken part in the event, which is scheduled this Saturday, for 14 years.
"This year, we took the decision to hold back from this event," Kremlin spokesman Dmitry Peskov told reporters Friday.
"It is because they have become a foreign agent."
Dmitry Medvedev, deputy head of Russia’s Security Council, has quoted a Second World War-era telegram from Soviet dictator Josef Stalin in a warning for the Russian military industrial complex, writes Nataliya Vasilyeva.
Mr Medvedev, who in recent months underwent a stunning transformation from an iPhone-toting liberal former president to an anti-Western hawk, on Thursday read out Stalin’s telegram to the directors of Russia’s military factories, threatening to “crush” them “like thieves” if they failed.
“Now I ask and hope that you will fulfil your duty to the motherland,” Mr Medvedev was seen in a video, reading the 1941 telegram to a tank factory in the Urals.
“In a few days, if you prove to violate your duty to the motherland, I will crush you like criminals who neglected the honour and interests of their motherland.”
Western intelligence have said Russia has been struggling to keep up weapons production to replenish its arsenal, having used up a high number of ammunition and weapons in Ukraine.
Asked about Mr Medvedev’s stance, a Kremlin spokesman on Friday said it was okay to draw on Russia’s war-time “priceless” experience. Russia's defence ministry said on Friday its forces had destroyed a hangar housing drones belonging to Ukraine's armed forces in the southwestern Odesa region of the country.