Lebanon’s army vowed to battle “terrorism” hours after a suicide bomber killed three soldiers at a checkpoint in the east near the border with war-torn Syria.

“The army knows that it is now more than ever targeted by terrorists who want to prevent the establishment of the authority of the state and its attempts to eliminate discord,” the military said in a statement issued late on Saturday.

It came as a new security plan came into effect on Sunday aimed at quelling spillover violence from the conflict in Syria.