US officials see fewer Russian sorties over Euphrates in Syria
Daniel Wasserbly - Jane's Defence Weekly
20 December 2017
Russian aircraft appear to have reduced sorties around the Middle Euphrates River Valley in Syria after a non-lethal engagement between US and Russian combat aircraft.A US Air Force F-22 pilot launched flares in response to a pair of Russian Su-25s flying close to the US aircraft. Tensions appear to have eased and US operators noticed fewer Russian sorties recently.
A 'deconfliction' agreement has the United States operating against Islamic State targets east of the river, and Russia operating west of the river. If either side needs to cross the river, they are to notify the other via a communication line.
http://www.janes.com/article/76540/us-officials-see-fewer-russian-sorties-over-euphrates-in-syria