Syrian forces have broken into the eastern town of Mayadeen, one of ISIS’s last bastions in Syria, in what can be described as a severe blow to the terrorist group, Rudaw reported.

Mayadeen is located in the oil-rich eastern province of Deir Ezzor. The town is seen as ISIS’s “security and military capital” in Syria. According to a Syrian military source, its loss would deal “a severe blow” to the terrorists.

“With support from Russian aviation, regime forces entered Mayadeen and took control of several buildings in the west of the town,” Rami Abdel Rahman, head of the Britain-based Syrian Observatory for Human Rights, told AFP.

ISIS militants have controlled Mayadeen since 2014. The town sits on the western bank of the Euphrates River, between provincial capital Deir Ezzor, where the terrorists still control several districts.

ISIS still controls half of Deir Ezzor province, despite advances by Syrian government’s forces and a separate offensive against the terrorists by the Kurdish-Arab alliance.

In another development, the Turkish Army and militants of Hay’at Tahrir Al-Sham reportedly clashed near the Syrian-Turkish border on Friday, after the militants attempted to cross into the Idlib Governorate.

According to reports, the Turkish Army and the militants clashed at the small town of Hadad, where the latter tried to hold their ground against the better equipped forces from Turkey.