Israel-Gaza updates: IDF says officer and soldier injured in attack from Lebanon

Thousands of people gathered for Hezbollah commander Fouad Shukr's funeral, including the top leader of Hamas in Lebanon. Hezbollah’s secretary general, Hassan Nasrallah, appearing via video, told the crowd that a response to Shukr’s killing is coming. He said there is no discussion about the retaliation -- adding that it will be big.

The main streets of Dahiya are lined with photos of Shukr, who was killed in an Israeli airstrike on Beirut Tuesday evening.

In the hours leading up to Thursday's ceremony, the growing crowd often chanted "Death to Israel," "America is the great Satan" and "Death to America!"

"It’s not the death of the citizens. It’s not the death of the innocents. It’s the death of the hypocrisy. Of the arrogance. And of the oppression," an unidentified man in the audience shouted at reporters.

After Nasrallah’s speech, Shukr’s yellow flag-draped casket was carried through the streets of Dahiya and to a burial site. Many people lined either side to pay their respects.

Speaking at the funeral of Hezbollah commander Fouad Shukr, Hezbollah leader Hassan Nasrallah said Israel has crossed a line, warning there will be rage and revenge.

Thousands of people lined the streets of Beirut to mourn Shukr.

Nasrallah said Hezbollah entered the battle believing its morality, legitimacy and importance, adding they are now in an open battle on all fronts that has entered a new phase.

Nasrallah denied responsibility for the Majdal Shams attack, which Israel and the U.S. have said came from Hezbollah. He also commented on the Israeli assassination of Hamas' political leader, Ismail Haniyeh, in Tehran, Iran, hours after Shukr was targeted in a strike on Beirut warning Iran will likely respond.

Throngs of people flooded the streets of Tehran on Thursday for the funeral procession of Ismail Haniyeh, the Hamas political leader who was assassinated early Wednesday.

Iran's supreme leader, Ayatollah Ali Khamenei, led funeral prayers over the bodies of Ismail Haniyeh and his bodyguard, who was also killed.

Haniyeh was killed in Tehran, the Iranian capital. His remains are expected to be transferred to Qatar, where he had lived in exile since 2019, for burial on Thursday.

No country or organization has yet taken credit for the assassination, but Khamenei appeared on Tuesday to place the blame on Israel. He said it was Iran's "duty to take revenge."

-ABC News' Morgan Winsor

Israeli officials said Thursday they had killed Mohammed Deif, commander of Hamas' military wing.

Deif was killed in "precise, targeted strike" in Khan Yunis on July 13, according to a joint statement by the Israel Defense Forces and the Israel Securities Authority.

Israeli Defense Minister Yoav Gallant announced the death in a post on social media, calling Deif the "Osama bin Laden of Gaza."

Gallant said his killing was "a significant milestone in the process of dismantling Hamas as a military and governing authority in Gaza, and in the achievement of the goals of this war."

Israeli Air Force fighter jets conducted the airstrike on a compound in the southern Gazan city, the joint statement said. The strike also killed Rafa'a Salameh, the Commander of Hamas' Khan Yunis Brigade, the military said.

"Over the years, Deif directed, planned, and carried out numerous terrorist attacks against the State of Israel," the joint statement said.

The statement continued, "Deif operated side-by-side with Yahya Sinwar, and during the war, he commanded Hamas' terrorist activity in the Gaza Strip by issuing commands and instructions to senior members of Hamas' Military Wing."

Gaza’s Ministry of Health said last month that at least 90 people, half of whom were children and women, were killed and 300 others were injured in the attack.

Hamas officials have not confirmed Deif’s death.

-ABC News' Morgan Winsor and Kevin Shalvey