"DTEK thermal power plants came under attack. According to preliminary data, there were no casualties," the company said in a statement. The location of the energy stations was not specified, presumably due to security reasons.Energy equipment was heavily damaged, but DTEK employees began repair work after the end of the attack. The company says this marks the eighth mass attack on its energy plants this year."In total, since the beginning of the full-scale invasion, DTEK thermal power plants have been fired upon more than 190 times," the energy operator said.Russia targeted "power generation and transmission facilities throughout Ukraine," according to Energy Minister Herman Halushchenko."The transmission system operator has urgently introduced emergency shutdowns," Halushchenko said. Energy infrastructure facilities were reported as damaged in the Volyn and Vinnytsia oblasts.Officials have been warning that Russia may resume strikes on the energy grid as temperatures drop, mirroring the strategy used in the spring and summer of this year and in the autumn-winter season of 2022-2023.President Volodymyr Zelensky said in September that past Russian attacks had destroyed all of Ukraine's thermal power plants and almost all hydroelectric capacity.