Sergey Ryabkov said the hypothetical extreme situations were outlined in detail in Russia’s military doctrine and the fundamentals of Russia’s state policy on nuclear deterrence ST. PETERSBURG, June 3. /TASS/. Any action against Russia’s territorial integrity from aggressors may trigger the use of nuclear weapons in the worst-case scenario, Russian Deputy Foreign Minister Sergey Ryabkov said on the sidelines of the St. Petersburg International Economic Forum (SPIEF) on Wednesday. "As regards us,