An 11-year-old boy who was recovered from the rubble of his apartment block hit by a Russian missile died, the head of the Mykolayiv regional military administration, Vitaliy Kim, has said.
His heart stopped when he was brought to hospital for dialysis, Kim added.
In the early hours, Russia pounded Mykolayiv with S-300 missiles. The boy was extracted from the debris after spending six hours trapped there.
According to Mykolayiv mayor Oleksandr Senkevych, the bodies of five victims were recovered from the rubble during the day. The search for another missing resident is ongoing.