U.S. F-22 fighter aircraft fired warning flares on Wednesday after two Russian Su-25 jets entered an agreed upon deconfliction area in airspace east of Euphrates river, a U.S. official said.
The official, speaking on the condition of anonymity, said the incident involved two F-22 jets and the Russian jets departed from the area after the flares were fired.
One official said that the aerial encounter lasted "several minutes", as the Russian jets crossed the de-confliction line several times.
US Air Force Central Command has indicated in the past that Russia regularly crosses these lines, which were established in an effort to avoid conflict between US-coalition forces and Russian forces. Russia crossed the line near the Euphrates River six to eight times a day in late November.
It doesn’t appear that Russia acknowledges this deconfliction zone. Not according to the "official" To my knowledge there is no agreed upon deconfliction zone east of the Euphrates..
At least not one publically acknowledged or necessarily agreed to as such.
However, I’ve long maintained the US has created and attempts to enforce a no fly zone east of the Euphrates.
June 23, 2017: Syria: Second SAA Jet Deterred by US Over An Obvious No Fly Zone
June 20, 2017: Did the US, Again, Enforce a No Fly Zone over Annexed Syrian Territory?