The sources said that the army units reached the regions near al-Amr oilfield just moments ago after they crossed the Euphrates River and moved to the Eastern bank of the river opposite the newly-freed town of al-Mayadeen after capturing the town of Zeiban earlier today.
They added that Syrian army forces have achieved fire control over the huge energy site, forcing the ISIL militants to fully withdraw from the region.
The al-Amr oilfield contributed to about one quarter of Syria’s oil production before the war and it was captured by ISIL militants in mid-2014.
Reports said earlier today that the army men captured Zeiban and several villages near al-Mayadeen in Southeastern Deir Ezzur, and came close to al-Amr oilfield.
The soldiers built floating bridge over the Euphrates River and crossed it.
The army soldiers later advanced against ISIL on the Eastern bank of the river, trying hard to take control over al-Amr oilfield and later move eastward to the borders with Iraq.
Most of the ISIL-affiliated news sources have not reacted to the developments, but Anab website reported that ISIL has started vast retreat in the region stretching from Deir Ezzur base to the town of al-Mayadeen.
In the meantime, the army soldiers resumed their anti-ISIL operation towards the town of Albu Kamal at the border with Iraq.
Al-Amr oilfield is located a few kilometers away from the town of Zeiban.