Emergency crews pulled the body of a toddler from the rubble in a pre-dawn search for survivors on Saturday of a Russian missile strike that tore through an apartment building in the central Ukrainian city of Kryvyi Rih.

The missile was one of what Ukrainian authorities said were 16 that got through air defenses among the 76 missiles fired Friday in the latest Russian attack targeting Ukrainian energy infrastructure, part of Moscow’s strategy to leave Ukrainian civilians and soldiers in the dark and cold this winter.

Gov. Valentyn Reznichenko of the Dnipropetrovsk region, where Kryvyi Rih is located, wrote on the Telegram social media app that “rescuers retrieved the body of a 1-1/2-year-old boy from under the rubble of a house destroyed by a Russian rocket.” In all, four people were killed in the strike, and 13 injured — four of them children — authorities said.

The victims were “a 64-year-old woman and a young family with a small son,” he wrote.

Reznichenko said the pounding from Russian forces continued overnight, damaging power lines and houses in the cities and towns of Nikopol, Marhanets and Chervonohryhorivka, which are across the Dnieper River from the Russian-occupied Zaporizhzhia nuclear power plant.