Pro-government troops backed by Russian warplanes on Friday retook a rebel bastion used as a launch pad for attacks in southern Syria, a monitor said, in their latest territorial gain.

Syrian soldiers, fighters from Lebanon's Hezbollah movement, and local and foreign militiamen seized Ataman, just two kilometres (1.3 miles) from Daraa, capital of the province of the same name, according to the Syrian Observatory for Human Rights.

"Rebels had used Ataman to launch attacks against Daraa, hence its importance for the regime," Observatory director Rami Abdel Rahman told AFP.

He said around 80 Russian air raids over the past two days had helped regime fighters chase Islamist rebels from the village, killing at least 10 of them.

The government of Syrian President Bashar al-Assad is attempting to retake all of Daraa province, which borders Jordan and the Israeli-occupied Golan Heights, from rebel fighters.

Last month pro-regime forces took the strategic town of Sheikh Miskeen, which lies on a vital crossroads between Damascus to the north and the government-controlled city of Sweida to the east.

"The army is consolidating its positions north of Daraa city," said Abdel Rahman, whose British-based monitor relies on a network of sources on the ground.

Most of Daraa province is controlled by opposition forces, though the government holds parts of the provincial capital and a few villages in the northwest.

Syria's army has been on the offensive since staunch government ally Russia began an aerial campaign in support of regime forces on September 30.

Since then, the regime has recaptured several key rebel towns in coastal Latakia province and has advanced in the northern province of Aleppo and in Daraa.