Russian attacks on Ukraine's northeastern Kharkiv region killed 34 civilians and injured 285 more in the 24 hours to Thursday morning, according to emergency services.
"The enemy continued to strike residential neighborhoods and entire settlements with its deadly bombs, shells and rocket-propelled grenades," said Ukraine's State Emergency Service (SES) in a statement.
Several dozen fires were caused by ammunition entering houses and administrative buildings, it added.
The SES listed a range of attacks that took place in the region Wednesday, with sites hit including residential and administrative buildings, as well as businesses. It said three people were killed at a garage.
"At midnight there was a massive air raid on the peaceful city of Izyum," which lasted two hours and damaged a 5-story residential building, it said.
"In addition, a massive airstrike affected the Saltivka residential area. In residential high-rise buildings, structures were damaged," it added.