Iran Press/Middle East: Two dead were a Lebanese and a Syrian citizen; the three wounded were members of the same family, the National News Agency reported.
The clashes took place around the highway that links Beirut with the country's south. Lebanese troops closed the highway and redirected traffic to another road.
The fighting lasted nearly three hours and a nearby building was torched.
The Lebanese army said it sent reinforcements to the area, known as Khaldeh, adding that troops detained four people, including two Syrians.
A search was underway for others involved in the clash.
Tensions have escalated in Lebanon, grappling with its worst economic and financial crisis in decades.
Apart from unrest due to the financial crisis, a powerful explosion took place on August 4 at warehouse No. 12 in the Lebanese capital, Beirut, causing extensive financial and human losses.
The blast has so far killed more than 177 people and injured about 6,000, according to the Lebanese Ministry of Health.
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