Israel believes it has killed Hezbollah's potential successor to Nasrallah

In what could be the latest in a series of major blows to Hezbollah, Israeli Defence Minister Yoav Gallant said it appeared the replacement for slain Hezbollah leader Sayyed Hassan Nasrallah had been "eliminated."

Hashem Safieddine, a top Hezbollah official, was widely expected to succeed Nasrallah. Safieddine, a cousin of Nasrallah, has not been heard from publicly since an Israeli airstrike late last week.

"Hezbollah is an organization without a head. Nasrallah was eliminated, his replacement was probably also eliminated," Gallant told officers at the Israeli military's northern command centre, in a brief video segment distributed by the military.

"There's no one to make decisions, no one to act."

Gallant did not provide further details.

The Israeli military said earlier Tuesday it killed a senior Hezbollah commander in a strike on Beirut while the militant group's acting leader promised more fighting against Israeli troops in southern Lebanon and rocket fire into Israel.

The military said the strike killed Suhail Husseini, who it said was responsible for overseeing logistics, budget and management of the group.

There was no immediate comment from Hezbollah on either Israeli claims.

In televised speech before Gallant's comments, Hezbollah's deputy leader said that the group backs efforts to reach a ceasefire in Lebanon, and for the first time omitted any mention of a Gaza truce deal as a pre-condition to halting the group's attacks on Israel.

Naim Qassem said Hezbollah supported attempts by Speaker of Parliament Nabih Berri, a Hezbollah ally, to secure a halt to fighting, which has escalated in recent weeks with the Israeli ground incursions and the killing of top Hezbollah leaders.

"We support the political activity being led by Berri under the title of a ceasefire," Qassem said in a 30-minute televised address.

It was not clear whether this signalled any change in stance after a year in which it has said it is fighting in support of the Palestinians during the Israel-Hamas war in Gaza.

Speaking in front of curtains from an undisclosed location, Qassem said the conflict with Israel was a war about who cries first, and Hezbollah would not cry first. The group's capabilities were intact despite "painful blows" from Israel.

"We are striking them. We are hurting them and we will prolong the time. Dozens of cities are within range of the resistance's missiles. We assure you that our capabilities are fine," said Qassem.