"Since 5:00 am (0200 GMT) enemy warplanes have launched strikes" on several areas of southern Lebanon, the official National News Agency said, adding that "the air aggression continued overnight" on other parts of the south, reporting unspecified casualties.

It also reported that "enemy warplanes and drones" targeted multiple locations the Baalbek area in eastern Lebanon's Bekaa Valley after midnight, also reporting casualties there.

Hezbollah and its arch-foe Israel have been exchanging near-daily cross-border fire since the Gaza war erupted last October, with the Lebanese group saying it is acting in support of Palestinian ally Hamas.

But the violence has spiralled in recent days and on Monday, Israel launched devastating strikes that resulted in the deadliest single-day toll since the end of Lebanon's 1975-1990 civil war.