Kyiv mayor Vitali Klitschko says a Russian missile and drone attack on the capitla early Friday has killed at least four people and injured 20 others.

Drones are “ubiquitous, because they are quite useful, and they're demonstrating that every day in Ukraine,” one analyst told NBC News.

After too many nights of pulling children from the rubble of Russian drone strikes, the weekend’s devastating attacks on Moscow’s military pride mark a brief respite for Ukrainian morale, and yet another twist of the unexpected.