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epa09974741 An elderly man cleans the flat of his son who was killed there during shelling in the outskirts of Kharkiv, Ukraine, 25 May 2022. Ukraine's second-largest city Kharkiv and its surroundings witnessed repeated airstrikes from Russian forces. On 24 February, Russian troops invaded Ukrainian territory starting a conflict that has provoked destruction and a humanitarian crisis. According to the UNHCR, more than 6.5 million refugees have fled Ukraine, and a further 7.7 million people have been displaced internally within Ukraine since. EPA/SERGEY KOZLOV