This is unusual.
US forces repel attack on Syrian alliesThe US has carried out rare air strikes on Syrian pro-government forces after what it called an "unprovoked attack" on allied Kurdish and Arab fighters...US officials estimated that 100 pro-government fighters were killed in the incident on
Wednesday...They had allegedly tried to take ground east of the River Euphrates captured from the Islamic State group by the US-backed Syrian Democratic Forces...State media said the US "aggression" left dozens of people dead or wounded.