STORY: In a televised speech on Tuesday, the leader of Hezbollah promised a "strong and effective" response to the assassination of its military commander by an Israeli strike.
Sayyed Hassan Nasrallah said the Lebanese Shia militia group would wait for the right moment to respond but did not hint on its form or timing.
And he said all international attempts at persuading Hezbollah not to retaliate were futile.
There was no comment from the Israeli military.
A July 30 strike killed Fuad Shukr in a Beirut suburb. He is the most senior Hezbollah figure killed in nearly 10 months of conflict with Israel.
Nasrallah's promise of vengeance comes amid rising fears that the Middle East could tip into full-blown war. Hezbollah is the most powerful regional militia armed and is backed by Iran.
Iran has promised to retaliate after an explosion in Tehran killed Ismail Haniyeh, the political leader of the Palestinian Hamas Islamist group.
Iran blames Israel. Israel has not claimed responsibility for Haniyeh's death.
Hezbollah earlier on Tuesday said it launched a swarm of attack drones at northern Israel.
A Reuters video filmed drones over the city of Nahariya. Israel said two civilians were injured.
While Nasrallah spoke, plumes of smoke were spotted over the Israel-Lebanon border.
The White House on Tuesday said U.S. President Joe Biden spoke with the leaders of Qatar and Egypt to discuss efforts to de-escalate tensions in the region.
