Russia fired a hypersonic Oreshnik missile at Ukraine in retaliation for an alleged attack on one of Putin's residences that the U.S. and Ukraine have denied.

It is only the second time Moscow has deployed the hypersonic ballistic missile, which was first used to hit Dnipro in November.

Russia bombarded Ukraine with hundreds of drones and dozens of missiles in a large-scale overnight attack, officials said Friday, killing at least four people. For only the second time, it used a new ballistic missile that it says flies at 10 times the speed of sound and is unstoppable.

Ukraine said the "Geran-5" bears similarities to Iran's Karrar attack drone, and uses a more powerful engine than Russia's current turbojet Shaheds.

Ukraine hits Russian drilling platforms in Caspian Sea, military reports * Ukraine brings US-made Tempest air defense system into combat, footage suggests * Russia seeks to set stage for new offensive,

Ukraine struck three Russian oil rigs operating in the Caspian Sea on Sunday following Moscow’s large-scale bombardment over the weekend that left thousands without heat or power in Kyiv.

Sgt. Dimko Zhluktenko, a commander of a drone team, told Business Insider what it was like flying in the heavy fog that Russia used to its advantage.

On the night of Sunday, January 11, Russia launched repeated strikes on critical infrastructure facilities in the Zhytomyr region, according to the Zhytomyr regional military administration. Two employees were injured as a result of the Russian attack.