ALSO SEE: Russia Pounds Ukraine as Zelensky, Europe Backers Prepare to Meet With Trump

Ukrainian officials said the deadly strikes were a further sign that Russia had no intention of halting hostilities.

Hours after President Volodymyr Zelensky of Ukraine arrived in Washington for high-stakes meetings to discuss a possible path to peace with Moscow, Russian attacks on the Ukrainian cities of Kharkiv and Zaporizhzhia killed 10 people and injured dozens, the local authorities said.

Ukrainian officials pointed to the attacks as a further sign that Russia had no intention of halting hostilities. “That’s why Putin doesn’t want to cease fire,” said Andriy Yermak, Mr. Zelensky’s chief of staff. “He enjoys shelling peaceful cities while talking about his desire to end the war.”

Videos of the aftermath of the strike in Kharkiv, in northeastern Ukraine, released by local authorities show parts of the building’s roof and upper floors gutted, as firefighters on a ladder spray water to try to extinguish flames. Seven people were killed in the attack, and some 20 people were also injured, the authorities said.

Three people were killed in a separate attack on the city of Zaporizhzhia, in southern Ukraine, and nearly 20 people injured, officials said. There was no immediate public comment from Russian authorities.

Before Monday’s strikes, Russia appeared to have scaled back its air attacks on Ukraine in recent weeks, in what Ukrainian officials and analysts see as an attempt by the Kremlin to curry favor with Mr. Trump during peace talks. The American president’s typically lenient tone toward Mr. Putin soured after Russia increased drone attacks on Ukrainian cities during talks last month between Moscow and Washington, prompting Mr. Trump to complain about seeing that “a rocket hit a nursing home, or a rocket hit an apartment building and people are laying dead in the street.”

Since the beginning of August, Russia has significantly reduced the number of drones and missiles it sends each night against Ukrainian cities. Kyiv, the capital, which was hit especially hard this summer, has been largely spared from attacks recently.

Ukraine, for its part, has escalated attacks on Russian oil refineries, attempting to keep pressure on the Kremlin to make concessions during negotiations by targeting its key revenue source.

A United Nations report covering the period from December to May found that nearly 1,000 civilians in Ukraine, including Russian-occupied areas, had been killed during that time, a 37 percent increase compared to the same period the previous year.

“The war in Ukraine, now in its fourth year, is becoming increasingly deadly for civilians,” said Danielle Bell, Head of the U.N. Human Rights Monitoring Mission in Ukraine.