The Lebanese Daily Star cited an anonymous security source saying that militant groups were advancing from a range of barren hills toward the Syrian towns of Jousieh and Qusayr.
Qusayr was one of the main strongholds of al-Qaeda-linked militants in Syria which was taken back by the Syrian army in June, 2013.
The town, located near Lebanon borders, was occupied by militants for nearly a year before army’s operations launched to retake the town during May and June.
Lebanese Army personnel from the Airborne regiment deployed in several locations along Masharih al-Qaa, al-Qaa and Ras Baalbek in light of the intense clashes in Syria, the source said.
Lebanon borders have been main supply routes for foreign-backed militants to enter more forces and arms to Syria.
Nearly all the supply routes to the terrorist al-Nusra Front militants were cut following Qusayr freedom.
Syria has been gripped by unrest for more than two years.
The foreign-charged militancy has taken its toll on the lives of thousands of people, including large numbers of Syrian soldiers and security personnel.
SHI/SHI