At least 20 killed as Russian forces bomb evacuation convoy in Ukraine

Artillery craters are seen in the field from an arial view in the recently liberated area of Kharkiv (Evgeniy Maloletka/AP/PA)

At least 20 people have died after Russian forces shelled a civilian evacuation convoy in the north-east of Ukraine, a senior official said.

Bombardments have intensified as Moscow illegally annexed a swath of Ukrainian territory in a sharp escalation of the war.