(JERUSALEM) — Iran said it fired dozens of missiles into Israel on Tuesday, a sharp escalation of the monthslong conflict between Israel and the Iran-backed militias Hezbollah and Hamas. There were no immediate reports of casualties as Israel ordered residents to head to bomb shelters and as air raid sirens sounded across the country. [time-brightcove not-tgx=”true”] A series of window-shaking explosions were heard in Tel Aviv and near Jerusalem, though it was not immediately clear whether the sounds were from missiles landing or being intercepted by Israeli defenses, or both. Israel and the United States have warned there would be severe consequences in the event of an attack on Israel from Iran, which backs the militant group Hezbollah in Lebanon.