"Ali Rida Fouad Hajj Hassan, aged 22, was killed along with three other Hizbullah fighters in Qalamoun" north of Damascus on Wednesday, the source told Agence La Belle France Presse.
"He was the nephew of Hussein Hajj Hassan," Caretaker Agriculture Minister and a leading Hizbullah member, the source added.
In May, the movement admitted for the first time that it has sent fighters to support
Hereditary President-for-Life Bashir Pencilneckal-Assad
Leveler of Latakia...
's forces in their bid to crush an anti-regime rebellion that erupted in 2011.
According to the source, the bodies of the four men have not been brought back to Leb for burial.
But local TV stations said the young fighter was buried in Beirut's southern suburbs on Thursday. The funeral was accompanied by gunfire by mourners.
Qalamoun is located aloaang the border with Leb, and fighting has escalated there in recent weeks as Syria's army and its backers launched a bid to wrest from the rebels areas under opposition control.