According to field source, units of the Syrian Arab Army and allied forces engaged in fierce clashes with groups of ISIS terrorists in Al-Shoula area in the Deir Ezzor desert after spotting their infiltration from the 55 km zone in Al-Tanf area, taking advantage of the heavy fog.
The units dealt with them with appropriate firepower and were able to kill and injure a number of terrorists.
So basically the US-Zionist aggression reveals the direct support for ISIS terrorist cells in the Syrian desert.