Followed by Americans shooting down a Syrian government fighter jet yesterday, Russia's defence ministry says they will treat all U.S. and U.S.-led coalition planes in Syria (west of the Euphrates River) as targets.

The (current) conflict started when it was confirmed by U.S. military that they shot down a Syrian jet SU-22 after it had dropped bombs near the Syrian Democratic Forces (U.S. partner forces). Sergei Ryabkov, Deputy Foreign Minister, asked that "What is this, if not an act of aggression?"

Russia is now set to suspend all it cooperation with U.S. in Syria. There used to be a standing agreement there to prevent such in-the-air incidents and now Russia takes the incident "as deliberate failure to make good on its commitments."

Furthermore, according to Russia's defence ministry, they will now treat all U.S. and U.S.-led coalition planes west of the Euphrates as targets.

Russia has been and is a strong ally of Syrian President Bashar Assad.