CHELYABINSK, October 22. /TASS/. A blast killed four people and wounded several others at an enterprise in Kopeisk, Chelyabinsk Region in the Urals, Governor Alexey Texler said on Telegram.

"According to preliminary information from the company, four people were killed and several others injured by the explosion," he wrote.

The governor also said that the version of an UAV strike is currently not confirmed.