A Russian ballistic missile strike on Friday in Ukraine's ​Kyiv region killed 10 people and injured ‌close to 100 others at a site where a defence industry event was being held, Ukrainian officials and industry representatives ​said.

President Volodymyr Zelenskiy, who did not name ​exact target, said that efforts to determine what ⁠happened were underway.

"A rescue operation is currently underway ​in the Kyiv region following a Russian missile strike," ​Zelenskiy said on Telegram.

Acting governor of Kyiv region Ruslan Oliynyk said that according to preliminary information, a ballistic missile strike hit ​a private training ground where events were taking ​place.

The Ukrainian Council of Defence Industry said that a missile ‌strike ⁠hit a site where representatives of the Ukraine's defence industry were present.

It said it was not an organiser of the event. Information regarding the exact whereabouts ​of the participants ​was not ⁠made public, it added.

Valerii Borovyk, founder of Ukrainian drone company First Contact, told ​Ukrainian media that a missile struck a ​training ⁠ground where a defence industry exhibition was being held.

Ukraine's prosecutor general, Ruslan Kravchenko, said that a criminal case ⁠had ​been opened on possible improper ​performance of official duties during the organisation and conduct of the even