Families in Ukrainian cities are taking refuge from massive swarms of Russian drones, as Moscow steps up its airborne assault with attacks designed to undermine Ukrainian morale.

Russian forces have changed their tactics for striking Ukraine. Russia is now attacking Ukrainian cities with swarms of lethal drones, informs CNN. CNN noted that Russia has intensified its air attacks on Ukraine in recent weeks.

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