Brother of tragic Ukrainian girl Polina dies after family was gunned down by Russian troops while fleeing Kyiv

THE five-year-old brother of tragic Ukrainian girl Polina has died after his sister and parents were cruelly gunned down by Russian troops. Little Semyon was left fighting for his life in hospital after he was wounded when Russian saboteurs targeted his family’s car with a hail of bullets as they tried to escape Kyiv. GettySemyon, five, has died after being left in critical condition in hospital[/caption] East2WestHis sister Polina was tragically killed when Russian saboteurs targeted her family’s car[/caption] East2WestDad Anton Kudrin, mum Svetlana Zapadynskaya with Sofia, Polina and Semyon[/caption] The youngster was unaware his sister Polina and their parents Anton Kudrin, and Svetlana Zapadynskaya were killed in the horror attack on Saturday. A heartbreaking photo captured the painful aftermath as it showed Semyon lying on a hospital bed on a ventilator. He was in a critical condition at Okhmatdyt children’s hospital – but tragically died on Wednesday, a relative told the Telegraph. Semyon’s older sister Sofia, 13, reportedly remains in critical condition and unconscious after being struck as her family desperately tried to flee the capital. Dozens of children have been killed in Vladimir Putin’s brutal war as it rages on for the ninth day – including a six-year-old girl wearing unicorn pyjamas who died after an airstrike in Mariupol. It comes as Ukraine has accused Vladimir Putin of wanting “another Chernobyl” after Russian forces attacked the biggest nuclear power plant in Europe. Most read in The Sun 'NUKE TERROR' Russians seize nuke plant amid fears of disaster '10x bigger than Chernobyl' BLITZED TO BITS Shocking photos show obliterated Russian army as Putin ‘loses 9,000 troops' MOLL-IDAY Molly-Mae shows off epic figure in bikini after insisting she's 'not in shape' 'SPARE US' Emmerdale fans LIVID as 'worst couple in soap history' get engaged simply stunning Gemma Collins smoulders in plunging neckline top at Simply Red gig DEATH PROBE Russian tycoon found hanged in garage of mansion days after Ukraine invasion The country’s president, Volodymyr Zelenskyy, said Russia was guilty of “nuclear terror” after the plant was set alight, as Boris Johnson announced he would be seeking an emergency U.N meeting. Dramatic live stream video from the site in Enerhodar showed Russian troops blasting away at one of the buildings. Read our Russia – Ukraine live blog for the very latest updates Speaking after the attack President Zelenskyy condemned the Russians. “No country other than Russia has ever fired on nuclear power units,” he said in a video message to his embattled nation. “This is the first time in our history. In the history of mankind. The terrorist state now resorted to nuclear terror.” Boris Johnson later spoke to Zelenskyy about the “gravely concerning situation” which was the result of Vladimir Putin’s “reckless actions”, Downing Street said. “Both leaders agreed that Russia must immediately cease its attack on the power station and allow unfettered access for emergency services to the plant,” said a spokesman, “The Prime Minister said the reckless actions of President Putin could now directly threaten the safety of all of Europe. “He said the UK would do everything it could to ensure the situation did not deteriorate further. “The Prime Minister said he would be seeking an emergency UN Security Council meeting in the coming hours, and that the UK would raise this issue immediately with Russia and close partners.   “Both leaders agreed a ceasefire was crucial.” All you need to know about Russia's invasion of Ukraine Everything you need to know about Russia's invasion of Ukraine... Why is Russia invading Ukraine? Will the UK go to war? How can I join the Ukraine foreign legion? What can I do to help Ukraine? Who is Ukraine’s president Volodymyr Zelenskyy? How much gas does the UK get from Russia? Is Russia a part of Nato? Does Russia have nuclear weapons? Why is Ukraine not in Nato? How big is the Russian army? What is Article 5 of the Nato treaty? What is the Minsk agreement? Which countries were in the Soviet Union?