Apparently, Ukrainian drones pushed through and started a chain reaction.
Explosions reportedly continued for hours, and authorities evacuated nearby settlements. Initial reports indicate that the site, previously protected by one of Russia’s densest air defense networks, suffered catastrophic damage.
Kirzhach is on the far side of Moscow from Ukraine. Did the drones fly over Moscow to reach it, or did they take a longer route?
They may have been launched from within Russia.