Israel and Iran exchange missile attacks for a third day; nuclear sites hit, death tolls rise, airspace shut, U.S. warns Tehran against retaliation.

Iran fired a new wave of missile attacks on Israel early Monday, triggering air raid sirens across the country as emergency services reported at least five killed and dozens more wounded in the fourth day of open warfare between the regional foes that showed no sign of slowing.

In a televised address following the airstrikes, Israeli Prime Minister Benjamin Netanyahu announced that Israel had launched a “targeted military operation” aimed at countering what he called an existential threat from Iran.