On November 21, Russia launched a missile into Ukraine, initially identified by Ukrainians as an intercontinental ballistic missile (ICBM). However, Russia claimed it was a new "hypersonic" missile, while the United States identified it as an intermediate-range ballistic missile (IRBM). The launch appears to be a response to Ukraine receiving permission to use Anglo-French Storm Shadow/SCALP missiles and American Army ATACMS missiles against Russian targets.
U.S. officials were quick to counter Ukraine's ICBM claims, asserting that the missile was an IRBM. Both types of missiles are designed for nuclear payloads and are not typically used in conventional warfare due to the risk of nuclear escalation. "There’s debate as to the nature of the missile (ICBM or IRBM), but the political objective is, in my opinion, much clearer," said Tristan Sauer, a GlobalData defense analyst.
The U.S. Embassy in Kyiv had issued a warning on November 20 about potential air attacks following notifications from Russia through nuclear risk reduction channels. Reports suggest that the U.S. had briefed Ukraine and allies about this potential threat days prior.