The Ukrainian president threatened to escalate attacks on Russia if Moscow repeated last winter’s strategy of targeting the power grid.
source https://www.nytimes.com/2023/09/18/world/europe/zelensky-60-minutes-russia-ukraine-war.html
source https://www.nytimes.com/2023/09/18/world/europe/zelensky-60-minutes-russia-ukraine-war.html