CORRECTION: Zelensky misspoke when he told Polish media that another mass grave with 900 bodies had been found in Kyiv Oblast.
President Volodymyr Zelensky's spokesman Serhiy Nikiforov elaborated in a comment to Ukrainska Pravda that while indeed a new mass grave had been found on April 29, Zelensky had been referring to the total number of people found in different mass graves in various locations in Kyiv Oblast.