The Lebanese Army fired warning shots into the air, and for their pains they were subjected to an ARTILLERY BARRAGE from the Israeils. So, yeah, if you are under an artillery barrage then you are going to bring up your snipers and tell them to take out that observation post. After all, it doesn't take a genius to work out that those dudes are directing that artillery fire.
Fire breaks out in Devira Forest, north of Be'er Sheva; four firefighting crews on scene (Haaretz)
from the article: Only we're allowed