Ukrainian drone attacks overnight into Saturday killed three people, Russian officials said Saturday. Russia’s Defense Ministry said air defenses intercepted or destroyed 112 drones across eight Russian regions and the Russian-occupied Crimean Peninsula.

More than three years into Russia's full-scale invasion, Ukrainians across the country retreat each night to bomb shelters and metro stations in a nightly ritual.

Ukraine’s drone manufacturers are scrambling to reach the Russian equipment that lurks beyond the radio horizon — the distance where the earth’s curvature blocks the video signal that Ukraine’s cheap strike drones depend on.