The State Emergency Service had previously stated that up to 18 people were killed but later revised the death toll from the crash, saying 14 had died.Mr Monastyrsky, who was one of President Volodymyr Zelensky's longest serving political advisers, is the highest profile Ukrainian casualty since the war began.The deputy head of Ukraine's presidential office, Kyrylo Tymoshenko, said the minister had been travelling to a war "hot spot" when his helicopter went down.Appearing via video-link at the World Economic Forum in Davos, President Zelensky asked leaders to observe a minute of silence for the lives lost in the helicopter crash, and later added "there are no accidents at war time.He was a recognisable face for Ukrainians throughout the war, updating the public on casualties caused by Russian missile strikes since Ukraine was invaded in February 2022."