For only the second time, Russia used a new ballistic missile that it says flies at 10 times the speed of sound and is unstoppable by air defenses.

Russia fired its new Oreshnik intermediate-range ballistic missile at the western Ukrainian city of Lviv overnight on Jan. 9, the Russian Defense Ministry said, calling the attack "retaliation" for an attempted Ukrainian drone strike on one of President Vladimir Putin's residences, a claim Kyiv has denied.

Ukrainian authorities reported multiple deaths and infrastructure damage after Russia said it deployed a new missile system in an overnight strike.

Moscow said the overnight strike was in response to an alleged Ukrainian drone strike on a residence used by President Vladimir Putin, which the U.S. and others said did not happen.

The attack was just the second time that Moscow had launched the nuclear-capable intermediate-range ballistic weapon.

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