Lebanese state media reported on Wednesday a third wave of Israeli raids on Hezbollah's south Beirut bastion in 24 hours, after the health ministry said another strike south of the capital killed six people.

The Israeli military pounded Beirut's southern suburbs with airstrikes on Tuesday, mounting one of its heaviest daytime attacks yet on the Hezbollah-controlled area after the defence minister ruled out a ceasefire until Israeli goals were met.

The new bombardment on both fronts comes on the verge of a deadline set by the United States for Israel to dramatically ramp up humanitarian aid allowed in Gaza or risk possible restrictions on US military funding.