At least one person was killed after a roadside bomb hit a car near the Lebanese-Syrian border on Tuesday, injuring at least three people in what appeared to be an attack on members of the Shi'ite militant group Hezbollah, soruces said.
Security sources said a barrage of gunfire hit the convoy of two sport utility vehicles immediately after the blast.
The bomb hit the cars on a road near the border crossing with Syria and comes a week after a car bomb injured more than50 people in a southern Beirut suburb controlled by Hezbollah, one of the most powerful political and military forces in Lebanon.
The Iranian-backed group has sent combatants to Syria to fight on behalf of President Bashar al-Assad, who is facing a two-year revolt against his rule. Syrian rebel groups have threatened reprisals against Hezbollah on Lebanese soil.
Several small roadside bombs have been set off near the Syrian border crossing in recent months.
Lebanon, which fought its own 15-year civil war, is struggling to stay on the sidelines of its larger neighbor’s bloody conflict. Car bombs and sporadic clashes between groups supporting opposite sides of Syria's war have become increasingly common.