At least 73 people have been injured in a Russian airstrike on Ukraine's Kharkiv overnight, with a bomb striking a passageway between hospital buildings in the city's Nemyshlianskyi district.

The strike damaged several medical facilities, including the targeted hospital and another healthcare institution, as well as a laboratory, 10 residential buildings and 13 vehicles, according to UNIAN.

Among those injured were hospital patients, medical workers and residents of nearby houses. Most of the victims were diagnosed with acute stress reactions.

According to preliminary findings, Russian forces may have used a FAB-250 aerial bomb equipped with a UMPK-5R guidance and correction module.

Law enforcement officers have recovered fragments of the munition from the scene.

The regional prosecutor's office has launched an investigation into the attack as a potential war crime.