KYIV, Ukraine — 

Russian rocket and artillery strikes hit areas across the Dnieper River from Europe’s largest nuclear power plant, Ukrainian officials said Sunday, as fears persisted that fighting in the vicinity could damage the plant and cause a radiation leak.

Russian forces took control of the Zaporizhzhia Nuclear Power Plant soon after the war began and hold adjacent territory along the left bank of the wide river. Ukraine controls the right bank, including the cities of Nikopol and Marhanets, each of them about six miles from the plant.

Heavy firing during the night left parts of Nikopol without electricity, said Valentyn Reznichenko, governor of the Dnipropetrovsk region. Rocket strikes damaged about a dozen residences in Marhanets, according to Yevhen Yevtushenko, the administration head for the district that includes the city of about 45,000.

The city of Zaporizhzhia, about 25 miles upriver from the nuclear plant, also came under fire during the night, wounding two people, city council member Anatoliy Kurtev said.

In eastern Ukraine, where Russian and separatist forces are trying to take control, shelling hit the large and strategically significant cities of Kramatorsk and Sloviansk, but no casualties were reported, said Pavlo Kyrylenko, governor of the Donetsk region.