Tehran: Iran fired a salvo of ballistic missiles at Israel on Tuesday in retaliation for Israel’s campaign against Tehran’s Hezbollah allies in Lebanon.

Alarms sounded across Israel and explosions could be heard in Jerusalem and the Jordan River valley after Israelis piled into bomb shelters. Reporters on state television lay flat on the ground during live broadcasts.

Iran has vowed to retaliate following attacks that killed the top leadership of its Hezbollah allies in Lebanon.

The firing of missiles came after Israel said its troops had launched ground raids into Lebanon, though describing them as limited. The Israeli campaign in Lebanon is the biggest escalation of regional warfare since fighting erupted in Gaza a year ago.

Iran, which sponsors Hezbollah, had vowed to retaliate against Israel, raising fears that war could spill across borders throughout the region, despite efforts by the United States, Israel’s closest and most powerful ally, to contain it.

In the latest announced killing of a senior Hezbollah figure, Israeli govt said it had assassinated Muhammad Jaafar Qasir, describing him as a commander in charge of weapons transfers from Iran and its affiliates.