CNN —

Russia carried out a "massive attack" on Ukraine's energy infrastructure, top Ukrainian officials said early Friday, leaving parts of the capital Kyiv without power.

The Kremlin appears again to be using a tactic deployed in previous years, depriving Ukrainians of power and heat ahead of the bitter winter months. Russia started attacking Ukraine's energy infrastructure in late September, according to official reports and CNN's assessment.

The attacks have been almost daily since then, with targets including energy generating facilities, including gas production and distribution.

Ukrainian President Volodymyr Zelensky called Friday's strike "a cynical and calculated attack, with more than 450 drones and over 30 missiles targeting everything that sustains normal life, everything

See Full Page