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.

The NATO-Ukraine Council convened at a meeting on Nov. 26 in response to Russia's use of the intermediate-range ballistic missile (IRBM), "Oreshnik", the NATO alliance said in a news release.

This is the first time Russia has used its so-called Oreshnik intermediate-range ballistic missile in combat. The launch also serves as a warning to the West.