Independent: Russia and Iran warn US they will 'respond with force' if red lines crossed in Syria again

The Russian Navy's frigate Admiral Grigorovich
 sails in the Bosphorus on its way to the Mediterranean Sea.
Reuters

"Following Friday’s cruise missile strike on a Syrian airbase, in retaliation for the chemical attack on Khan Sheikhoun earlier in the week, the alliance supporting Syrian President Bashar al-Assad made a joint statement threatening action in response to “any breach of red lines from whoever it is”.

“What America waged in an aggression on Syria is a crossing of red lines. From now on we will respond with force to any aggressor or any breach of red lines from whoever it is and America knows our ability to respond well,” the group’s joint command centre said."