Syrian government troops have ambushed rebels near the capital Damascus, killing at least 40 opposition fighters, according to state media.
The ambush was part of the military's offensive against rebel strongholds around president Bashar Assad's seat of power.
It came hours after Assad's forces captured the town of Hatitat al-Turkomen, south of the city, securing a key route that links the capital with Damascus International Airport.
State-run SANA news agency said 40 rebels were killed in the ambush near the Otaiba area, and that a large arms cache was seized, including anti-tank rockets.
The area is part of a region known as Eastern Ghouta, which was the scene of a chemical weapons attack in August when several hundred people, including many women and children, were killed.
An unidentified Syrian army officer in the area told state-run Al-Ikhbariya TV station that there were foreign fighters among the dead and that the ambush followed an intelligence tip.
The TV broadcast footage showing more than a dozen bodies of men lying on the ground in an open area near a small river, along with scattered automatic rifles and hand grenades.
"It was a highly accurate operation," the officer told Al-Ikhbariya. "We will be moving from one victory to another."
Another soldier, who was also not identified, said the rebels belonged to the Islam Brigade and an al Qaida-linked faction, Jabhat al-Nusra or Nusra Front.
In other violence, the Observatory reported that a car bomb blew up outside a mosque in the village of Wadi Barada, and that 40 people were either killed or wounded in the blast. SANA said the car blew up as people were rigging it with explosives.
Elsewhere, Kurdish gunmen battled jihadi rebels in a north-eastern town along the border with Iraq, leaving a number of casualties on both sides, activists said. Such battles have become increasingly common in Syria's bloodletting, adding another complex layer to the civil war, now in its third year.
The Observatory said Kurdish gunmen made advances in the predominantly Kurdish province of Hassaekh and entered the town of Yaaroubiyeh, clashing with several jihadi groups, including al Qaida-linked Islamic State in Iraq and the Levant and Nusra Front.
Rebel-held Yaroubiyeh lies along one of the main border crossing points into Iraq and its capture would give the Kurdish militiamen a direct supply line from Iraq's northern Kurdish region.
The area has seen heavy fighting before and clashes between Kurdish fighters and jihadis in northern Syria have killed hundreds of people in the past months. In March, gunmen killed 51 Syrian soldiers after they crossed from Yaaroubiyeh. The Syrians had crossed into Iraq to seek refuge following clashes with rebels on the Syrian side of the border.
Meanwhile, Syrian helicopter gunships attacked several areas of the rebel-held northern town of Safira, south-east of the heavily contested city of Aleppo, the country's largest. A military complex near the town is believed to include an underground facility for chemical weapons production and storage.
France-based Doctors Without Borders said 130,000 people have fled Safira this month and that the town has been under intense bombardment since October 8. A statement from the group said 76 people had died in the town.