Syrian Forces Have Seized Territory From U.S.-Backed Syrian Rebels East Of The Euphrates River

DW: Syrian army fights US-backed SDF troops east of Euphrates

So far Syrian government forces have largely stayed west of the Euphrates river, but rare clashes have changed that. Last time this happened Syria faced a violent US counter-attack.

Syrian government forces directly clashed with US-backed rebels on Sunday, with state-run new agency SANA reporting they had seized rebel-held villages.

The two sides have only rarely clashed before, with the Syrian army largely staying west of the Euphrates.

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Update #1: Syrian army says forces have captured several villages from US-backed rebels (The Independent)
Update #2: Syrian Army Captures Villages from US-backed Forces (VOA)

Update: U.S. backed Syrian rebels are now claiming that thye have taken back this lost territory .... U.S. backed forces say they regain villages seized by Syrian army (Reuters).