Russia attacked four DTEK thermal power plants overnight, causing casualties and serious damage to equipment.
DTEK Group reported on its Facebook page.
"The enemy has once again massively shelled Ukraine's energy facilities. Last night, four DTEK thermal power plants were attacked. According to preliminary information, unfortunately, there are casualties," the statement said.
The power engineers are currently trying to eliminate the consequences of the attack.
Since the start of the full-scale invasion, DTEK's thermal power plants have been shelled more than 170 times.