Syrian Mujahideen shot down two Russian military warplanes over the northwestern province of Idlib.
Both jets were hit with fire from heavy machine guns while the air force was carrying out a series of raids in the area, much of which is under the control of the Mujahideen.
The Mujahideen fighters trying to oust bloody tyrant Assad also captured the town of Shadadah, near the Jbeysa oil field in Hasaka province,.
The oil field is in an energy-rich area along Syria's border with Iraq.
The Mujahideen captured about 70 percent of the oil field but there was still sporadic gunfire in the area.
Mujahideen were also battling Alawite regime forces for the third straight day for control of the main airport in the northern city of Aleppo.
On Wednesday, the Mujahideen knocked down army defenses and closed in on the country's second largest airport in Aleppo, Syria's main commercial hub.
The airport stopped all flights weeks ago because of the fighting.
Earlier this week, Mujahideen captured the nation's largest dam and an Alawite military base near the northern commercial city.
They have also brought the fight closer to the heart of Damascus, seat of Assad's regime.