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.

Ukraine launched a large drone strike Sunday that caused damage at Russia's Kursk Nuclear Power Plant and a major fuel export terminal hundreds of miles away.

It comes as Ukraine is celebrating its independence day on Sunday, which marks the country's declaration of independence from the Soviet Union in 1991. The United Nations' International Atomic Energy Agency (IAEA) has repeatedly called on both Russia and Ukraine to show maximum restraint around nuclear facilities in the war.

Russia and Ukraine exchanged 146 prisoners of war from each side on Sunday after mediation by the United Arab Emirates, the Russian defence ministry and the Ukrainian president said.