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

In his first public statements since Israel killed top Hamas and Hezbollah leaders, Israeli Prime Minister Benjamin Netanyahu warned it would retaliate strongly "against any aggression."

"Challenging days are ahead of us. Since the attack in the Beirut, threats have been heard from all sides. We are ready for any scenario and will stand united and determined against any threat. Israel will charge a price, a very heavy price, for any aggression against us from any arena," Netanyahu said Wednesday.

Senior Hamas official Khalil al-Hayya said Tuesday that the talks with Israel are "meaningless" and that they were "close" to a deal but that Israeli Prime Minister Benjamin Netanyahu doesn’t want one.

"The negotiation is meaningless despite the bloodshed. We had a paper [agreement] and the deal was close. They do not want to stop being usurper. Netanyahu does not want a deal. Hence, we had dedicated all we could. Our path is not the path of surrendering," al-Hayya said during a press conference Wednesday.

Egypt also warned that the Israeli assassinations undermine truce talks and warned against dangerous security consequences.

Egypt condemned the killing of Hamas chief Ismail Haniyeh in Tehran and Hezbollah military leader Fouad Shukr in Beirut as a "dangerous escalation" by Israel that could fuel conflict in the region, according to a statement issued Wednesday.

The Egyptian foreign ministry said the assassinations "undermine the strenuous efforts made by Egypt and its partners to stop the war in the Gaza Strip" and "indicate the absence of Israeli political will to calm the situation."

-ABC News' Hami Hamedi and Ayat Al-Tawy

Hamas claimed that its political leader Ismail Haniyeh was killed by a rocket that entered the room where he was staying, Khalil al-Hayya, a high-ranking Hamas official said in a press conference Wednesday. He warned that Israel will pay the price for Haniyeh's death.

Al-Hayya also slammed Israeli Prime Minister Benjamin Netanyahu for hampering cease-fire talks.

-ABC News' Hami Hamedi

U.S. Secretary of State Antony Blinken called his Jordanian counterpart Wednesday to discuss "the urgency of efforts to reach a ceasefire to the conflict in Gaza" and "the importance of preventing further escalation of the conflict," according to a statement from the State Department.

The statement doesn't specifically mention the Israeli strike in Lebanon or the killing of Hamas' political leader, but Jordan is viewed as a key strategic partner for maintaining stability in the Middle East by U.S. officials.

-ABC News' Shannon K. Kingston