Analysts say the Kremlin is prioritizing its own war against Ukraine, as well as its relations with Gulf nations that don’t want to see a stronger Iran.

"The fact remains that Russia was unable to prevent a mass strike by Israel on a country with which five months ago [Russia] signed a comprehensive strategic partnership. "Clearly Moscow is not prepared to go beyond political statements condemning Israel, it's not ready to provide Iran with military assistance."

Rising tensions in the Middle East will accelerate natural gas negotiations between Russia and China, with a decision likely this year, the head of a think-tank that advises the Russian government on China told Reuters.