The Pentagon says the Oreshnik is a tweak of Russia’s RS-26 Rubezh missile, an intercontinental ballistic missile (ICBM) that has been tested since 2011.

Russian President Vladimir Putin defended Russia's use of Oreshnik intermediate range missile and claiming that NATO has no way to intercept it.

STORY: On Nov. 21 Russia struck Ukraine's Dnipro with a new kind of missile.Known as Oreshnik, or hazel tree in Russia, it caused limited damage, according to senior officials. But the first combat use of such a design – which Russian President Vladimir Putin called unstoppable – has drawn scrutiny from Western military experts.

Vladimir Putin is threatening to launch a new intercontinental ballistic missile, which he calls "Oreshnik," against Ukraine, with Kyiv potentially being the target, the Russian media Kommersant reports.