Hezbollah, Israel exchange heavy fire after deadly Israeli strike

Israel and Lebanon exchanged heavy fire into Sunday, with Israeli warplanes carrying out the most intense bombardment in almost a year of war across Lebanon's south, while Hezbollah claimed rocket attacks on military targets in Israel's north.

The Israeli military said it struck around 290 targets on Saturday including thousands of Hezbollah rocket launcher barrels and said it would continue to strike targets of the movement.

Israel closed schools and restricted gatherings in many northern areas of the country and the Israeli-occupied Golan Heights early on Sunday.

Sirens sounded all night as multiple rockets and missiles were fired from Lebanon and Iraq, most of which were intercepted by Israeli aerial defence systems, the military said.

Israeli media reported that a number of buildings were hit directly or by falling missile debris, and ambulance services said they treated some lightly injured people. No serious casualties were reported.

Hezbollah said it targeted the Israeli Ramat David Airbase with dozens of missiles in response to "repeated Israeli attacks on Lebanon", the group posted on its Telegram channel early on Sunday.

The successive barrages of rocket attacks launched by Hezbollah at Ramat David are the deepest strikes it has claimed since hostilities began.

An Iraqi group, in a statement, also claimed an explosive drone attack on Israel early on Sunday.

The escalating attacks come less than 48 hours after an Israeli airstrike targeting Hezbollah commanders killed at least 37 people in a suburb of the Lebanese capital, according to authorities.

Hezbollah said 16 members including senior leader Ibrahim Aqil and another commander, Ahmed Wahbi, were among those killed on Friday in the deadliest strike in nearly a year of conflict with Israel.

Israeli Prime Minister Benjamin Netanyahu said on Sunday it has, in recent days, hit Hezbollah in ways it could not imagine.

"If Hezbollah has not understood the message, I promise you, it will understand the message," Netanyahu said, according to a statement from his office.