The Ukrainian security service (SBU) said it has foiled a Russian plot to assassinate President Volodymyr Zelensky and other high-ranking Ukrainian officials.
Two Ukrainian government protection unit colonels have been arrested.
The SBU said they were part of a network of agents belonging to the Russian state security service (FSB).
They had reportedly been searching for willing "executors" among Mr Zelensky's bodyguards who could take him hostage and kill him.
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