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       Air raid warnings rang out across the country, with 10 Ukrainian regions coming under fire, the Interior Minister, Ihor Klymenko, said. The main target was the energy grid.

       Russia has escalated its attacks on Ukraine in recent days, launching several missile barrages on Kyiv and hitting energy infrastructure across the country in apparent retaliation for recent Ukrainian aerial attacks on the Russian border region of Belgorod. Such sporadic attacks, however, have been common throughout the war.

       In the winter of 2022-23, Russia targeted Ukraine’s energy grid, causing frequent blackouts across the country. Many in Ukraine and the West expected that Russia might repeat this strategy this winter, but Russia instead focused its strikes on Ukraine’s defence industries.

       Ukraine’s state-owned grid operator, Ukrenergo, said that Friday's attack deliberately targeted thermal and hydroelectric power plants across central and western regions.

       DTEK, Ukraine’s largest private electricity operator, also said that three of its thermal power plants had been damaged in the attack.

       Elsewhere, five people, including a 5-year-old girl, were wounded during the attack in Ukraine’s Dnipropetrovsk region, said local governor Serhii Lysak.

       He later said that another man had been killed and one more injured in a separate drone attack Friday.

       Also on Thursday, a Russian fighter plane crashed into the sea off Sevastopol the port city on the Crimea Peninsula, the Moscow installed governor of the region said.

       It's not yet known whether it was shot down or suffered a malfunction. Some Russian military bloggers speculated that it may have been shot down by friendly fire.

       Russian fighter jet crashes into sea off Crimea

       Meanwhile, the bombardment in the west of Ukraine caused the Polish Armed Forces to scramble its own aircraft, the country’s operational command said on social media.

       Last week Warsaw demanded an explanation from Moscow, after one of its missiles strayed briefly into Polish airspace during a major missile attack on Ukraine, prompting the NATO member to activate F-16 fighter jets.

       Romania’s defence ministry also said on Friday that an investigation has been launched after fragments that appear to be from a drone were identified on its territory Thursday evening in an agricultural area of Braila county, close to the border with Ukraine.

       It did not provide additional details, although since the start of the full-scale invasion of neighbouring Ukraine, NATO member Romania has confirmed drone fragments on its territory on several occasions.

       Belgorod also came under fire Friday, Russia's Ministry of Defence wrote on social media. It said that it shot down 15 Ukrainian shells, with falling debris damaging a number of residential buildings. No casualties were reported.

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       Does your dog understand when you talk to them?

       Yes, according to some owners. And that's what researchers think too.

       A recent study carried out in Hungary revealed that, apart from commands, man's best friend can understand words representing objects.

       In their study, researchers used electrodes to analyse what was going on in their brains.

       "We thought that if the dogs really understood the meaning of the word, the name of the object, they would expect to see that object. And that if the owner showed them another object, there would be a surprise reaction in the brain. And that's exactly what we found," explains Marianna Boros, a researcher in the Department of Ethology at Loránd E？tv？s University.

       Researchers noticed a different pattern in the dogs' brains when the right word is not associated with the right object. This is exactly what happens in the brains of humans.

       "When we try to identify certain abilities in dogs or understand how the brain processes certain types of stimuli, we also learn at the same time about what they have in common with humans and what is specific to humans", continues Marianna Boros.

       The results of this study show that in dogs, these abilities seem to be innate and do not require any particular training or talent.

       Watch the full report in the video above.

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       The search for tranquillity and meditation.

       This is what has driven monks and hermits since the 9th century to the Abbey of San Benedetto on Mount Subasio, a few kilometres from Assisi in central Italy.

       Restored several times after the terrible earthquake that struck central Italy in 1997, today it is run by Benedictine nuns who have entrusted its custody to its sole inhabitant: Albero Cisco.

       Watch the full report by Euronews correspondent Luca Palamara in the player above.