Moscow and Beijing have both said they will never permit U.N. authorization of military force against Syria

Russia, U.S. quarrel over aid to Syrian parties

By Susan Crabtree 

The diplomatic battle between the U.S. and Russia over Syriaescalated Wednesday, with Secretary of State Hillary Rodham Clintoncalling on Russia to stop arming the embattled regime and Moscow charging the U.S. of providing weapons to the Syrian opposition.
Foreign Minister Sergei Lavrov acknowledged in Moscow that Russia is supplying “anti-air defense systems” to Damascus, a deal he said “in no way violates international law. 

The Washington Times