Israel's military said Sunday that it was "not aware" of any U.S. or Israeli strike on a school in Iran that Iranian authorities say was hit the previous day, killing over 100 people.

The Israeli military on Sunday said it had destroyed roughly half of Iran's missile stockpiles, adding the Islamic republic had been producing dozens of surface-to-surface missiles each month.

Iranian state television confirmed the death of its supreme leader Ayatollah Ali Khamenei and launched a fresh wave of attacks on Sunday as Israel hit back at the capital Tehran.

Iranian state television on Sunday confirmed the death of Iran's supreme leader Ayatollah Ali Khamenei, without referring to a massive U.S. and Israeli attack on his residence.

Israeli Prime Minister Benjamin Netanyahu said that there were signs that Iran's Supreme Leader Ayatollah Ali Khamenei had been killed in an attack on his compound as part of U.S.-Israeli strikes.

The U.S. ambassador to Lebanon informed the country that Israel had no intention of escalating hostilities as long as no attacks were launched from Lebanon, the Lebanese presidency said in a statement.

The message came as Lebanese authorities fear Iran-backed Hezbollah could become embroiled in renewed conflict with Israel after the U.S. and Israel bombed Iran on Saturday and Tehran responded with missile attacks.

The United States and Israel launched a wave of strikes against targets in Iran on Saturday, sparking swift retaliation by the Islamic republic which responded with missile attacks across the region.

Two witnesses told AFP they heard an explosion and saw a plume of smoke rising from Dubai's famed man-made island The Palm, as Iran carried out retaliatory strikes in the Gulf following U.S. and Israeli attacks.

Lebanon's Iran-backed Hezbollah called on Saturday for the Middle East to stand against Israel and the United States' attack on Iran.

The death toll from an attack Saturday on a school in Iran's south has risen to 85, the judiciary said, after the U.S. and Israel launched strikes on the Islamic republic.

"The number of martyrs at the girls' school in Minab has increased to 85," the judiciary's Mizan Online website quoted the area's prosecutor's office as saying.