A helicopter crashed into a building in the city of Brovary, outside the Ukrainian capital on Monday morning, officials and local media reported.
According to Ukrainian police, the crash killed 16 people, including two children. Nine of them were onboard.
Top Ukrainian Interior Ministry officials are among the dead, including the minister Denys Monastyrskyy.
Kyiv regional governor Oleksiy Kuleba said on Telegram, "In Brovary a helicopter has crashed next to a nursery and residential building."
"Children and the employees of the kindergarten were there at the moment of the tragedy," he said, adding that they have since been evacuated.
Earlier, the deputy head of the presidential office said the site affected was a "social infrastructure" building.