Hizballah has denied Israeli claims that its leader ordered the killing of military commander Mustafa Badreddine after he objected to the Lebanese Shia paramilitary group's huge losses in Syria.
Since Friday Israel and Syria have engaged in a number of tit-for-tat cross-border attacks with accompanying rhetoric from both sides threatening further retribution
Israeli aircraft carried out several strikes on Syria last week, prompting the launch of ground-to-air missiles in response, one of which was intercepted.
Israel reportedly launched a drone attack on Yasser al-Sayyid while he was driving towards the Golan Heights on Sunday afternoon.
Israeli Defence Minister Avigdor Lieberman on Sunday threatened to destroy Syrian air defense systems after they fired ground-to-air missiles at Israeli warplanes carrying out strikes.
Anti-aircraft missiles were launched from Syria into Israeli-controlled territory early on Friday, following a series of Israeli airstrikes inside Syria.
Israeli Prime Minister Binyamin Netanyahu expressed concerns to Russian President Vladimir Putin over increased Iranian influence in war-torn Syria.
Prime Minister Binyamin Netanyahu reportedly turned down an offer from former US Secretary of State John Kerry to make peace with Arab states in return for some concessions to Palestinians.
Yoav Galant, Israel's minister of construction, reportedly unveiled a plan to rebuild Syria in return for sovereignty over the Golan Heights and a curb on Iranian influence in the region.
Multiple rockets and shelling were fired into Israel from its southern border with the Sinai region, as well as its eastern border with Syria, the army said.