The Lebanese army's artillery was on Sunday pounding the posts of the militants in the outskirts of the eastern border towns of Arsal and Ras Baalbek, state-run National News Agency reported.
Security sources meanwhile told al-Jadeed television that an Islamic State group had carried out an attack on posts for the al-Nusra Front rival jihadist group in the Ajram area in Arsal's outskirts.
“A member of the attacking force blew himself up outside one of the posts,” the sources said.
“The army's artillery targeted an IS infantry force that was trying to infiltrate into the Ajram area, inflicting confirmed casualties,” the sources added.