At least two Hizbollah guerrillas and five Syrian rebels have been killed in fighting in Syria on the border with Lebanon, Lebanese residents and Syrian opposition sources said yesterday.

The clash between Lebanese Shi’ite Hizbollah and Sunni Muslim rebels, in a religiously-mixed area southwest of the city of Homs, shows a growing role for Hizbollah in Syria’s war, which is deepening the Middle East’s sectarian divide.

Iranian-backed Hizbollah, one of Lebanon’s strongest factions, is a major ally of Syrian President Bashar al-Assad, whose minority Alawite sect is an offshoot of Shi’ite Islam.

Fighting began on Saturday as Lebanese Hizbollah fighters, in control of eight Syrian border villages, tried to move into three adjacent villages held by Syrian Free Army rebels, said Hadi al-Abdallah of the Syrian Revolution General Commission.

Syrian helicopters fired rockets at rebel positions to support the advancing Hizbollah unit, which included pro-Assad militia recruited from the villages it controls, residents said.

“The Hizbollah force moved on foot and was supported by multiple rocket launchers. The Free Syrian Army had to call in two tanks that had been captured from the Assad army to repel the attack,” Abdallah said by phone.

The villages of Burhanieh, Abu Houri and Safarja, defended by the rebels, lie on smuggling routes. Many locals have Syrian and Lebanese nationality and property on both sides of the border. Hizbollah guerrillas, based in the Bekaa Valley on the other side of the undemarcated border, moved into the area last year.

Around 70,000 people have been killed in Syria’s 23-month-old conflict, which grew into an armed revolt after street protests against four decades of autocratic rule by Assad and his late father were met by live ammunition.

The war has worsened sectarian tensions throughout the region, with hardline Sunni Islamists dominating armed opposition and Iran indicating it will not allow Assad to fall.

Tehran has said one of its Revolutionary Guard commanders was killed in Syria by Syrian rebels on Thursday.

In a sign of sectarian brutality by Assad’s foes, a video obtained by the Syrian Observatory for Human Rights showed members of the al Qaeda-linked Nusra Font and other fighters standing around bodies of five men killed at a gas field in the eastern province of Hasakah taken by rebels this week.

Three of the dead men, one of them in military trousers, had their heads smashed.

A voice on the video describes the dead as rejectionists, a derogatory term for Alawites. “These are the scum of society the pigs, the rejectionist ... God is greater,” the voice says as the camera zooms in on the bloodied bodies.

Syria has been the main supply line to Hizbollah since it was founded in the 1980s. Support by Assad and his father was crucial for its survival of Israeli onslaughts in 1996 and 2006.

The revolt against Assad has prompted movement of arms in the opposite direction.

The border area near the town of Qusair, held by the mainly Sunni rebels, has become an important supply route for insurgents under siege in the central city of Homs.

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