The Russian military said its anti-aircraft units had thwarted a Ukrainian "terrorist attack" early on Tuesday and downed drones targeting Moscow, but one drone, sent out of control by its units, struck the same high-rise tower hit earlier in the week.
Video showed a fiery ball exploding amid a loud boom by high-rise buildings in the Moskva Citi business complex. A plume of smoke billowed into the night sky.
"On the night of August 1st, an attempted terrorist attack by the Kyiv regime with lethal drones on targets in Moscow and Moscow region was thwarted," the Defense Ministry said in a statement on the Telegram messaging app.