Iran warns Riyadh against sending troops to Syria

Will we finally see a direct clash between Saudi and Iran? This comes after Saudi has announced it participated in the air campaign this weekend.

Iranian Foreign Minister Mohammad Zarif warned Saudi Arabia Tuesday not to deploy troops in Syria, saying it would violate international law, while also demanding that Riyadh stop bombardments in Yemen.

Zarif, whose country supports the government of Syrian President Bashar Assad, was questioned about Saudi Arabia's announcement that it could deploy ground forces as part of the U.S.-led coalition fighting ISIS.