The Israeli military said Friday it struck the headquarters of Hezbollah in Beirut, where a series of massive explosions leveled multiple buildings and sent clouds of orange and black smoke into the sky in the biggest blasts to hit the Lebanese capital in the past year. At least two people were killed and dozens were wounded, Lebanon’s health ministry said, reports AP.

Three major Israeli TV channels said Hezbollah leader Hassan Nasrallah was the target of the strikes in Beirut’s southern suburbs. The unsourced reports could not immediately be confirmed by The Associated Press, and the army declined comment. But given the size and timing of the blasts, there were strong indications that a senior leader may have been inside the buildings struck.

Hours earlier, Netanyahu addressed the U.N., vowing that Israel’s campaign against Hezbollah would continue — further dimming hopes for an internationally backed cease-fire. News of the blasts then came as Netanyahu was briefing reporters traveling with him. A military aide whispered into his ear, and Netanyahu quickly ended the briefing.

To a degree unseen in past conflicts, Israel this past week has aimed to eliminate Hezbollah’s senior leadership. Israeli army spokesman Rear Adm. Daniel Hagari said the strikes targeted the main Hezbollah headquarters, located beneath residential buildings. Defense Minister Yoav Gallant’s office said he was huddling with the head of Israel’s air force and other top commanders at military headquarters, following updates.

The series of gigantic blasts at around nightfall reduced six buildings to rubble in the Haret Hreik neighborhood of Beirut’s Dahiyeh suburbs, according to Lebanon’s national news agency. The shock wave rattled windows and shook houses some 30 kilometers (18 miles) north of Beirut. TV footage showed several craters — one with a car toppled into it — amid collapsed buildings in the densely populated, predominantly Shiite neighborhood.

First responders were still searching under the rubble hours later as others struggled to put out fires. The full scope of casualties was not immediately clear, the health ministry said, adding that 15 of the 76 wounded had been hospitalized. Many people who live in the vicinity were seen gathering belongings and fleeing along a main road out of the district.

Nasrallah has been in hiding for years, very rarely appearing in public. He regularly gives speeches – but always by video from unknown locations. The site hit Friday evening had not been publicly known as Hezbollah’s main headquarters, though it is located in the group’s “security quarters,” a heavily guarded part of Haret Hreik where it has offices and runs several nearby hospitals.

The Pentagon said the U.S. had no advance warning of the strikes.

Israel dramatically intensified its airstrikes in Lebanon this week, saying it is determined to put an end to more than 11 months of Hezbollah fire into its territory. The scope of Israel’s operation remains unclear, but officials have said a ground invasion to push the militant group away from the border is a possibility. Israel has moved thousands of troops toward the border in preparation.

Bd pratidin English/Lutful Hoque