NATO: Russian Nuclear Strike Would Almost Certainly Draw ‘Physical Response’

Flags are seen ahead of a NATO Defense Ministers meeting at the Alliance headquarters in Brussels, Belgium, October 21, 2021. REUTERS/Pascal Rossignol

A Russian nuclear strike would change the course of the conflict and almost certainly trigger a "physical response" from Ukraine allies and potentially from NATO, a senior NATO official said on Wednesday.

Any use of nuclear weapons by Moscow would have "unprecedented consequences" for Russia, the official warned.