Russia warns West after threat of Syrian intervention

A top Russian official warned the West on Tuesday after U.S. President Barack Obama threatened potential consequences that would occur if Syrian President Bashar al Assad used chemical or biological weapons.

Sergei Lavrov, Russia's foreign minister, spoke on the subject after meeting with China's top diplomat. Russia and China are in opposition to military intervention in Syria. The two countries have vetoed three U.N. Security Council resolutions that would have pressured Damascus to end the violence that has led to more than 18,000 deaths, Reuters reports.

"(Beijing and Moscow are committed to) the need to strictly adhere to the norms of international law...and not to allow their violation," Lavrov said, according to Reuters.

While the U.S. and other Western countries have showed little desire to intervene in the mainly Sunni Muslim opposition to al Assad's Alawite minority, Obama used strong language on Monday to tell the regime to not use unconventional weapons.

"We have been very clear to the Assad regime, but also to other players on the ground, that a red line for us is (if) we start seeing a whole bunch of chemical weapons moving around or being utilized," Obama said, according to Reuters. "That would change my calculus. We cannot have a situation where chemical or biological weapons are falling into the hands of the wrong people."