Russia launched a massive drone and missile attack on Ukraine’s energy facilities on Tuesday, killing several people and triggering countrywide power outages just as winter temperatures drop before the holidays.

At least three people were killed, including a four-year-old child who died after a drone hit a residential building in the north-western Zhytomyr region, Ukrainian President Volodymyr Zelenskyy said on Tuesday. Thirteen regions were attacked, including the Kyiv area, where apartment buildings and houses were hit.

“This was a deliberate and cynical Russian attack on the eve of Christmas,” Ukrainian Prime Minister Yulia Svyrydenko wrote on X. ‘‘While people were preparing for the holidays, the enemy [is] trying to leave Ukrainian families without electricity, heat and a sense of safety.”