Five rockets fired from a Grad multiple launch rocket system hit the territory of the Avdiivka Coke Plant in the Donetsk region.
According to Ukrinform, the Prosecutor General's Office reported this on Telegram.
Several production shops and a pipeline were destroyed in the attack.
Heat supply in Avdiivka was halted.
Earlier reports said that Russian troops had already killed 2,187 residents of Mariupol.