"A convoy of 16 ISIL oil tankers was targeted by the Syrian Army in the region of Shaghaf located [in the] southeast of Sweida province," the sources were quoted by FARS said.
According to the sources, all of the oil tankers were set ablaze during the army's attack, and an array of the convoy's military guards were killed.
The army and the Syrian National Defense Forces intensified their military operations against Daesh terrorists in Sweida last month.
In particular, the Syrian troops, supported by the NDF, obliterated Daesh positions in the village of Al-Qasr in northern Sweida, sources said. Although the mostly government-held province is predominantly Druze and practices a Unitarian religion which features elements of Christianity, Buddhism and Neoplatonism, many Sunni Muslims have taken refuge in the province, fleeing areas which have been held by Islamist militants in neighboring Daraa Province. They represent a small portion of the 6.5 million internally displaced Syrians who predominantly reside in government-controlled areas of the country.
#SYRIA Russian airstrikes resulted in significant losses of terrorists and allowed Syrian army and patriotic opposition to continue offense— Минобороны России (@mod_russia) 11 января 2016
Meanwhile, the Syrian air force reportedly managed to destroy a spate of Islamic militant strongholds to the east of Damascus, killing dozens of terrorists and wounding many more.
Adding to the Syrian army's anti-Daesh effort is the Russian air campaign, which was launched on September 30, 2015, when more than fifty Russian warplanes, including Su-24M, Su-25 and Su-34 jets, commenced precision airstrikes on Islamic State targets in Syria at the behest of Syrian President Bashar Assad.