Russian forces launched a massive attack on the energy infrastructure in two Ukrainian regions on the night of March 15, causing significant damage to energy facilities, according to DTEK (Ukraine's largest private energy company).

Ukrainian officials say Russia targeted energy facilities with dozens of missiles and drones in a nighttime attack. U.S. says it cut Ukraine's access to satellite images.

Russia has repeatedly targeted key energy assets inside Ukraine, with officials accusing the Kremlin of 'weaponising winter'.