Russia pounded Ukraine with hundreds of drones and dozens of missiles on Saturday, in the fourth major attack this month, targeting western cities and killing at least two people in Chernivtsi on the border with Romania.

The city of Kyiv came under a large-scale drone and ballistic missile attack on the night of 9-10 July. Loud explosions have been heard in the capital, fires have broken out and casualties have been reported.

Kyiv has recently suffered the most intense bombing it has seen since Russia began its full-scale invasion three years ago. What does Vladimir Putin hope to achieve — and how can the destruction be stopped?