The more likely story

According to the Israel Defense Forces (IDF), "Hezbollah fired two to three anti-tank missiles from Lebanon, hitting an IDF military outpost and ambulance in northern Israel."
"We fired at the Hezbollah squad responsible. No Israelis were injured in the attack," the IDF said in a tweet.
Israel said it had responded with artillery and helicopter fire, sending about 100 shells across the border at Hezbollah positions.
Radio reports from northern Israel say residents in some border communities have been sheltering in bunkers after suffering sustained rocket attacks.
Meanwhile, Hezbollah is quoted by local media as saying the movement destroyed an Israeli tank, killing and injuring those on board.
However, it provided no evidence, and its claims were rejected by Israel.

Israel, the IDF, knew an attack was coming. They left an old ambulance, and evacuated a small military outpost knowing that Hezbollah would fall for the scam.   This is too repetitive for the IDF, they no doubt work the angles.