Beirut: Syrian government forces have been intensively shelling the southern province of Quneitra since early Sunday and seized part of the region, a war monitor said.

“The bombardment started from 03.00 (midnight GMT) and continued for the last six hours,” said Rami Abdul Rahman, the head of the Syrian Observatory for Human Rights.

“Around 800 missiles and shells have been fired against several areas in the province and fierce fighting continues on the ground between regime forces and rebels,” the chief of the Britain based monitor said.

Regime forces have retaken the area of Masshara, he added.

“Bombardments have also hit areas in (neighbouring) Dara’a province.”

He did not immediately provide an estimate of casualties.

After securing Damascus and outlying areas of the capital, President Bashar Al Assad’s regime on June 19 launched an offensive against Dara’a, with support from Russia.

The Dara’a onslaught took less than three weeks to break the rebels’ grip, with the regime now in control of more than four-fifths of that province’s territory, the monitor said.

Rebels still control 70 per cent of Quneitra, while the Syrian government is in full control of Sweida - a third southern province - the Observatory added.

Quneitra province borders the Israeli-occupied Golan Heights.

Israel has been on high alert in recent weeks as Al Assad’s forces have tackled rebel-held areas of southern Syria.

Abdul Rahman said that unlike in Dara’a, fighter planes had not been used in the Quneitra offensive and that Russia was not yet taking part.

The Israeli army said on Friday it had fired a missile and “very probably” destroyed a drone flying over the demilitarised zone between Israel and Syria, after intercepting another drone on Wednesday.

Spurred on by Russia’s entry into Syria’s civil war in 2015, Al Assad’s regime now controls 61 per cent of the country’s territory, according to the Observatory.

Syria’s conflict has killed more than 350,000 people since March 2011.