The Iran-backed Hezbollah militia and the Israel Defense Forces (IDF) on Saturday exchanged fire across the border with Lebanon, with two occupants of a car killed on the Lebanese side, according to Lebanese security sources. The car was hit by a rocket, it said. The IDF declined to comment on the report, and it was not clear from where the rocket had been fired. Hezbollah said its forces had conducted three attacks on Israeli forces and that Israeli troops had been hit in the vicinity of Hunin Castle, a former crusader fortification near the Israeli settlement of Margaliot less than a kilomet…