Oryx Blog is an excellent source of information going on in the Levantine War and other foreign hotspots.
He/She is so well informed that they must be an insider intelligence professional - not that I have any knowledge of the former. Just making an assumption.
The blog's article on this assault on is impressive in it's detail. Methinks that perhaps the Syrian Arab Army, is being out generalled! Very disappointing how a so called professional army, can leave the spoils of war intact when retreating.
One would think an officer or leading NCO would ensure that some thermal grenades were used on each piece of equipment before leaving, and any ammunition that can't be taken with them, destroyed.
Not sure if these defenders were "elite" troops or not - I hope not! The article is here: "The Islamic State's spring offensive: al-Sukhna"