"[Syrian] rebels worried last week that regime forces would get too close to U.S. [special forces] base at [the southern Syrian town of] Tanf," reported BuzzFeed News correspondent Mike Giglio. "It seems that happened today, and [the] coalition struck."
Warning shots were reportedly fired first at the Iranian-backed Syrian army militia convoy. The U.S. previously attacked Assad's forces after the regime's use of chemical weapons in the town of Idlib.
The U.S.-led coalition and the Assad regime are mutually fighting the Islamic State in the region.