Israel has targeted central Beirut with at least four airstrikes, according to security sources cited by Reuters news agency.
Lebanon’s state-run National News Agency said the attack “completely destroyed” an eight-storey residential building in the Basta neighbourhood early on Saturday.
Footage broadcast by Lebanon’s Al Jadeed station also showed at least one destroyed building and several others badly damaged around it.
It is not immediately clear how many have been killed or injured and the Israeli military did not warn residents to evacuate before the attack, the fourth targeting the centre this week.
At least four bombs were dropped in the attack, security sources told Reuters news agency.
The blasts happened at about 4am (2am UK time) and came after a day of bombardment of Beirut’s southern suburbs and the southern coastal city of Tyre.
The Israeli military had issued evacuation notices prior to those strikes.
Israel has killed several Hezbollah leaders in air strikes on Beirut’s southern suburbs.
Heavy fighting between Israel and Hezbollah is ongoing in southern Lebanon, as Israeli forces push deeper into the country since launching a major offensive in September.
US envoy Amos Hochstein was in the region this week to try to end the more than 13 months of fighting between Israel and Hezbollah, ignited last October by the Gaza war.
Mr Hochstein indicated progress had been made after meetings in Beirut on Tuesday and Wednesday, before going to meet Israeli Prime Minister Benjamin Netanyahu and defence minister Israel Katz.
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According to the Lebanese health ministry, Israel has killed more than 3,500 people in Lebanon and wounded more than 15,000.
It has displaced about 1.2 million people – a quarter of Lebanon’s population – while Israel says about 90 soldiers and nearly 50 civilians have been killed in northern Israel.
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