Russian drones struck two passenger trains in northern Ukraine on Saturday, killing at least one person and injuring dozens of others in the region of Sumy, Ukrainian officials said.

After the first train was struck, rescue crews raced to help the wounded and evacuate survivors from it. Then a second Russian drone slammed into another train nearby, witnesses and Ukrainian officials said.

President Volodymyr Zelensky of Ukraine said dozens of people had been injured and accused the Russians of once again deliberately attacking civilians. Russian officials have denied targeting civilians, but their forces have hit people in bread lines and on playgrounds, as well as apartment blocks, hospitals and other civilian centers throughout the war.

“This is terror the world must not ignore,” Mr. Zelensky said in a statement.

Parts of the Sumy region had already been without power for three days when the Russian drones struck on Saturday, Ihor Saldyga, a local journalist, said in a phone interview.

“First they hit power infrastructure, then they struck the railway station several times,” he said. “They were striking the locomotives with precision.”

The attack was the latest in a series of strikes aimed at railway infrastructure and part of a broader campaign Russia has been waging for more than three years to ravage the nation’s critical services.