The Syrian army has liberated the eastern city of Deir ez-Zor, the terrorists’ last stronghold on the west bank of the Euphrates River, from ISIS militants, SANA news agency reported.

“Units of the Syrian Arab Army, in cooperation with the allied and supporting forces, have accomplished the mission of fully liberating Deir ez-Zor city from [the] ISIS terrorist organization,” a military source said on Friday.

During the mission, dozens of ISIS fighters, including the terrorist group’s leaders, were killed and their weapons and equipment were also destroyed, the source added.

Ever since the mission succeeded, the Syrian army’s de-mining experts have been clearing landmines, bombs and other explosive devices left behind by ISIS militants in the area.

Deir ez-Zor is located in the western part of Syria, bordering with Iraq. The governorate used to be one of the key pockets of territory that remained under ISIS control.

The terrorist group had been blockading the city for nearly three years, before the siege was ended in September by the Syrian army, backed by Russian airstrikes.

After the siege was broken, the Syrian army and Russian Air Force face fierce resistance from the terrorists in the surrounding neighborhoods of the city.

“Every day there is combat,” Ibrahim, a Syrian army officer, was quoted by Russia Today.