At least 16 people, including two children, were killed when a helicopter crashed near a pre-school outside the Ukrainian capital Kyiv, the region's governor said.
Police said Ukraine's interior minister Denys Monastyrsky and other officials are among the dead.
"In the city of Brovary, a helicopter fell near a kindergarten and a residential building," the head of the Kyiv regional administration, Oleksiy Kuleba, said on Telegram.
"At the time of the tragedy, children and employees were in the kindergarten," he added. "There are casualties."
He said that medics and police were working at the scene.
A police spokesperson said 22 people were injured in the crash.
The town of Brovary is located some 20km northeast of Kyiv.
Russian and Ukrainian forces fought for control of Brovary in the early stages of Moscow's invasion until Russia's troops withdrew in early April, RTE reports.
