At least three civilians were killed and several dozens wounded in a massive Russian attack overnight on several regions across Ukraine.

Moscow launched some 40 missiles and 580 drones at its war-torn neighbor, in the largest barrage the war had seen in weeks, officials said.

“Every such strike is not a military necessity but a deliberate strategy by Russia to terrorize civilians and destroy our infrastructure,” Ukrainian President Volodymyr Zelensky posted on X, confirming that residential areas were being targeted in the attacks.

“That is why a strong international response is needed. …Every restriction on Russia saves lives.”

At least one person was killed and 36 more injured in the central Dnipropetrovsk region, Gov. Serhii Lysak said. 

Russia has been trying to establish a foothold on the region this summer, which sits at the border of the occupied territories in the south.

Residential buildings were bombed and a row of cars were set ablaze from the successive blasts as plumes of dark black smoke blotted out the sky. 

Firefighters spent the day putting out the blazes, with four dozen apartment buildings destroyed, Lysak said, as rescuers and volunteers searched through the rubble, with the injury count rising through the day.

A 55-year-old man was among the seriously wounded in the hospital, with burns on 70 percent of his body as he clings to life.

“This is a brutal terror of civilians,” Lysak wrote on Telegram.

He said about 100 Ukrainian residents whose high-rise building was damaged in the strikes had to be resettled. 

Schools and kindergartens were also destroyed, he added.

Officials also reported several strikes on the capital city of Kyiv, and seven other regions.

Moscow also targeted the country’s energy grid overnight, as fears grow of renewed attacks on Ukraine’s energy infrastructure could throw the country back into mass blackouts this winter, the Kyiv Independent reported.

Despite diplomatic efforts from the international community for the warring sides to reach a cease-fire, the attacks have only intensified in recent weeks.

The Ukrainian military, meanwhile, struck two Russian oil refineries that together produce 16 million tons of oil for export annually, as Zelensky pushes his campaign to take aim at strongman Vladimir Putin’s war chest.

“The Defense Forces of Ukraine are systematically implementing measures aimed at reducing the military-economic potential of the aggressor state,” wrote the Ggneral staff of Ukraine’s Armed Forces on Facebook.

Social media videos from residents showed an explosion after a drone struck the refinery, sparking a large fire.

The strike resulted in a shutdown of pumping Saturday, a source in Ukraine’s Security Service told the Kyiv Independent.