Speaking to reporters in Beirut Friday, Roed-Larsen, said it was paramount for leaders of the two countries to agree on their shared borders.

He said until such an agreement is reached, the U.N.-demarcated Blue Line that was drawn after Israel withdrew from the South in 2000, will continue to be considered as the official boundary between Lebanon and Israel.

Kassem said his party does not recognize the Blue Line and will continue "defending Shabaa according to what we say is our border and the United Nations has no business interfering between us and Syria."

Lebanon claims the zone, which has been controlled by Israel since it captured the Golan Heights from Syria in the 1967 Arab-Israeli war. However, the United Nations says Shabaa belongs to Syria.

Syrian Vice President Farouk Sharaa said Thursday that Damascus had never claimed the disputed Shabaa Farms and that Lebanon should deal with the issue since it is the one seeking to define the region's identity.