Russian drones bombed Kyiv, the capital of Ukraine, killing at least four people setting the city's main government building on fire.

Ukrainians said it was the first time a key building in Kyiv’s government district had been damaged since the war began. Russia has kept attacking despite Trump administration efforts at peace talks.

Many of the drones aren’t particularly fast or high-tech, but they are cheap enough for the Kremlin to launch more than 700 in one night, in an effort to overwhelm Ukraine’s air defenses. Here’s what we know.