A Russian drone strike on a residential building in Sumy, eastern Ukraine, has killed at least four people and injured nine, including a child, according to officials.

Images show a massive hole in the Soviet-era building as rescue teams search for survivors. President Zelensky called it a "terrible Russian crime" and urged the world to maintain pressure on Moscow.

Ukraine reports 81 drones were launched, with 37 intercepted. The attack also targeted key port infrastructure in Odesa.