Russia has used its nuclear-capable ballistic missile — dubbed Oreshnik — three times in the war against Ukraine. According to the Kremlin, it is a "state-of-the-art" weapon that cannot be intercepted.

Citing Ukrainian and Western intelligence reports, Zelensky said Russia appeared to be preparing an Oreshnik missile strike on Ukraine.

Ukraine is working to verify intelligence from the United States and others that suggests Russia is preparing to use a hypersonic ballistic missile system.