Ukrainian drone strikes on southern Russia killed a 9-year-old boy and set fire to a major oil terminal, officials said Saturday, the day after Moscow launched a massive aerial attack on its neighbor that Ukrainian President Volodymyr Zelensky said was one of the heaviest bombardments of the country’s energy sector in the nearly three-year war.

Ukrainian President Volodymyr Zelensky said Russia launched 93 missiles and 200 drones in one of its largest attacks on Ukraine’s energy system.

Russia launched a new widespread attack on Ukraine’s energy infrastructure overnight, forcing the country to implement emergency power outages, Ukrainian authorities said on Friday.