Israel-Gaza-Lebanon updates: Israel planning limited ground operation in Lebanon

Naim Qassem, Hezbollah's deputy secretary general, addressed followers Monday in the first leadership statement since Hassan Nasrallah was killed in an Israeli airstrike in Beirut on Friday.

"The mujahadeen will continue," Qassem said of the militant group's fighters, their work informed by "what [Nasrallah] designed."

Qassem did not announce a replacement for Nasrallah, but said Hezbollah's next leader will be chosen "sooner rather than later."

Details of Nasrallah's funeral are still unconfirmed. A three-day mourning period in Lebanon began on Monday.

-ABC News' Ghazi Balkiz and Joe Simonetti

The Israel Defense Forces said it carried out an operation against more Hezbollah targets early Monday morning local time.

The Israeli Air Force attacked targets in the Bekaa region of Lebanon, the IDF said in a statement.

Targets included launchers and buildings where the IDF said weapons were held.

The Israeli Air Force also attacked what it said were military buildings in southern Lebanon.

-ABC News Will Gretsky

The death toll in Lebanon as a result of Israeli airstrikes Sunday rose to 105, according to the Lebanese Ministry of Health.

Nearly 360 individuals were wounded in the strikes, the ministry reported.

The strikes occurred in southern Lebanon, the Bekaa, Baalbek-Hermel and the southern suburbs of Beirut (Dahieh), according to the ministry.

Israeli Prime Minister Benjamin Netanyahu has appointed opposition lawmaker Gideon Sa'ar to rejoin his cabinet, the politicians announced in a joint statement Sunday.

Sa'ar will serve in the Security Cabinet, according to Netanyahu.

"I appreciate the fact that Gideon Sa'ar responded to my request and agreed today to return to the government," Netanyahu said, noting how the leaders have put aside their disagreements.

"We will work together, and I intend to use him in the forums that influence the conduct of the war," Netanyahu added.

Sa'ar was once a member of Netanyahu's Likud Party but defected after an unsuccessful bid for party leadership. He formed his own party in 2020 called New Hope.

"I am joining the government at this stage without a coalition agreement - but with an orderly worldview and with a strong patriotic attitude for our people," Sa'ar said in the joint statement.