Iran's parliament speaker on Thursday said Lebanon was a key part of the two-week ceasefire with the United States, warning that violations would bring severe consequences, following massive Israeli strikes on Lebanon.

Israel vowed more strikes against Hezbollah on Thursday, dismissing mounting international demands that the fragile truce between the United States and Iran in the Gulf be expanded to cover the war in Lebanon.

Lebanon's cabinet on Thursday instructed security forces to restrict weapons in Beirut exclusively to state institutions, a day after Israeli strikes across the country including in the heart of the capital.

Israel's military said Thursday it had struck and killed a close adviser to Hezbollah chief Naim Qassem in Beirut a day earlier, when Israeli strikes pummelled Lebanon.

Britain's foreign minister said Thursday the UK "strongly" wants Lebanon included in the Middle East ceasefire as Prime Minister Keir Starmer arrived in the United Arab Emirates.

Rescuers searched for survivors under the rubble of destroyed buildings in Beirut on Thursday as Lebanon observed a day of mourning after Israeli strikes across the country killed more than 200.

U.S. President Donald Trump will continue to discuss with Israeli Prime Minister Benjamin Netanyahu the idea of including Lebanon in an Iran war ceasefire deal, his spokeswoman said Wednesday.

Hezbollah said Wednesday it has a "right" to respond to Israel's deadly wave of strikes across Lebanon, which authorities said left at least 112 people dead and more than 800 wounded.

The Israeli military said it struck a Hezbollah commander in Beirut on Wednesday, after Lebanese state media reported that Israel had targeted the Tallet al-Khayyat residential neighborhood in the capital.

Lebanon announced the reopening of the Masnaa border crossing with Syria starting Wednesday evening, state media said, after it had been closed for several days due to an Israeli threat to target it.