Mujahideen captured Syria's biggest hydro-electric dam and battled Alawite army tank units near the center of Damascus.
The Mujahideen seizure of the Taqba dam, a prestige project on the Euphrates River in the eastern Raqqa province completed by Assad's father in the 1970s, has impact on Syria's already unreliable power supplies.
Mujahideen fighters overrun Alawite Satan's army positions around the dam on Sunday.
The dam was protected by an enemy artillery battery and many intelligence units. The Mujahideen moved on them in a lightning Sunday offensive, overrunning their positions and capturing scores of personnel".
Meanwhile, in Damascus, Assad's forces brought up Russian tanks to defend an area just east of the city center on Monday.
Jobar, a district adjacent to the landmark Abbasid Square, has seen fighting in recent days. However, Assad's forces remained well dug in in the city center.
The main battle is taking place in Jobar. The Mujahideen are advancing in the eastern sector.