Hezbollah will directly engage in the Iran-Israel conflict if the United States intervenes militarily or if Iran’s Supreme Leader Ayatollah Ali Khamenei is assassinated, a source told Middle East Eye. Hezbollah considers such actions as crossing a "red line." Earlier, on June 14, Hezbollah lawmaker Hasan Fadlallah declared, "Iran knows how to defend itself," signaling that any threat to its sovereignty could draw in regional allies.