Fighting raged on Saturday near a sprawling nuclear power plant in the south of Ukraine, despite warnings from nuclear-safety watchdogs this past week that conditions there were posing risks and "out of control.”

The Russian military has been using the Zaporizhzhia plant, Europe’s largest, as a base to assault the Ukrainian-controlled town of Nikopol across the river. On Saturday, it fired a volley of Grad rockets that damaged 11 apartment buildings and 36 privately owned houses, and wounded three people, the Ukrainian military said.

The assault also knocked out electricity, water and natural gas supplies in the town, where residents have been fleeing from the artillery attacks and attendant risk of radiation, the Ukrainian military said.