Civilians flee Ukrainian city as safe corridor opens

A mother and her child, fleeing Ukraine, wait to board a bus at the border crossing in Medyka, Poland (AP)

Buses packed with people fleeing the Russian invasion of Ukraine are under way in one city, as a new effort to evacuate civilians along safe corridors finally begins.

The route out of the eastern city of Sumy was one of five promised by Russia to offer civilians a way to escape the Russian onslaught.