A sscreenshot from the video
The Syrian Arab Army (SAA) and its allies are working to drive ISIS out from the area between the southern countryside of al-Mayadin and the city of al-Bukamal.
Video: Syrian Army Advancing On ISIS Positions Between Al-Bukamal And Southern Countryside Of Al-Mayadin
Without the Tigers it would seem. It would appear that the SAA no longer rates this front as important enough.