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.

Ukraine's energy and gas infrastructure came "under massive missile and drone shelling" by Russia on Friday, a Ukrainian minister said.