BEIRUT>> Lebanon’s Hezbollah group confirmed on Saturday that its leader and one of its founding members, Hassan Nasrallah, was killed in an Israeli strike in a southern suburb of Beirut.

The killing of the powerful militant group’s longtime leader sent shockwaves throughout Lebanon and the Middle East, where he has been a dominant political and military figure for more than three decades.

Nasrallah, linked by Israel to numerous deadly attacks on Israeli and Jewish targets, has been on Israel’s kill list for decades. His assassination is by far the biggest and most consequential of Israel’s targeted killings in years, and significantly escalates the war in the Middle East. Hezbollah is backed by Iran, Israel’s chief regional rival.

The Israeli military said it carried out a precise airstrike on Friday while Hezbollah leaders were meeting at their headquarters in Dahiyeh, south of Beirut.

Immediately after the confirmation from Hezbollah, people starting firing in the air in Beirut and across Lebanon to mourn Nasrallah’s death.

“Wish it was our kids, not you, Sayyid!” said one woman, using an honorific title for Nasrallah, as she clutched her baby in the western city of Baabda.

“We don’t believe he is killed,” a woman draped in black tearfully told al-Manar TV in Bekaa, western Lebanon. “We don’t. We left our homes and came here for him and for the resistance.”

In his first public remarks since the killing, Prime Minister Benjamin Netanyahu said Israel’s targeting of Nasrallah was “an essential condition to achieving the goals we set.”

“He wasn’t another terrorist. He was the terrorist,” Netanyahu said.

Netanyahu said Nasrallah’s killing would help bring displaced Israelis back to their homes in the north and would pressure Hamas to free Israeli hostages held in Gaza. But with the threat of retaliation high, he warned the coming days would bring “significant challenges” and warned Iran against trying to strike.

“There is no place in Iran or in the Middle East that Israel’s long arm cannot reach. And today you know how much that is true,” he said.

The Lebanese Health Ministry said six people were killed and 91 wounded in the strikes Friday that leveled six apartment buildings. Ali Karki, the commander of Hezbollah’s Southern Front, and other commanders also were killed, the Israeli military said.

A statement from Hezbollah said Nasrallah — who led the group for more than three decades — “has joined his fellow martyrs.” The group vowed to “continue the holy war against the enemy and in support of Palestine.”

Cross-border aggression

Hezbollah started firing rockets on Israel in support of Gaza on Oct. 8, a day after Hamas militants launched an unprecedented attack on Israel, killing some 1,200 people and abducting another 250. Since then, the two sides have been engaged in escalating cross-border strikes.

Israel has vowed to step up pressure on Hezbollah until it halts its attacks that have displaced tens of thousands of Israelis from communities near the Lebanese border. The recent fighting has also displaced more than 200,000 Lebanese in the past week, according to the United Nations.

Earlier this month, thousands of explosives hidden in pagers and walkie-talkies used by Hezbollah detonated, killing dozens of people and maiming thousands, including many civilians. Israel is widely believed to be behind the attack. Israel has killed several other top Hezbollah commanders in Beirut, especially in the past two weeks, in addition to the attack that killed Nasrallah.