This month’s summits between America, Russia and Europe haves produced no concrete agreements on ending Ukraine’s war. On land, Ukrainian forces are limiting Russian advances on the eastern front to a slow, bloody crawl. At sea too, it is up to Ukraine’s drones, missiles and small boats to keep the Russians out.

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.

Russia launched drones and a missile into Ukraine overnight into Sunday, the air force in Kyiv said, as the country kicked off independence day celebrations marking the anniversary of its 1991 declaration of independence from the Soviet Union.

Russia said power and energy facilities had been targeted by Ukraine, which accused Russia of "spreading manipulations".

Russia launched drones and a missile into Ukraine overnight into Sunday, the air force in Kyiv said, as the country kicked off independence day celebrations marking the anniversary of its 1991 declaration of independence from the Soviet Union.