The area around Al-Makheirma hill outside Ras Baalbek village has seen regular incursions from Islamist militants fighting in Syria’s war.
Four other militants were wounded in the clashes, the army said in a statement. It did not specify which groups the combatants belonged to but said the operation aimed to “eliminate terrorists” to prevent them targeting soldiers and civilians in Lebanon.
Syria-based groups such as al Qaeda’s Nusra Front and Islamic State have attacked Lebanon and taken soldiers captive since last summer in some of the worst spillover from the four-year civil war.
Tuesday’s operation destroyed a large number of weapons used by the militants, the army said.