The Iran-backed militant group's acting leader insisted Hezbollah will not agree to a ceasefire unless Israel withdraws from Gaza, as IDF rolls more troops into Lebanon.

Hezbollah fired a barrage of around 180 rockets into Israel on Tuesday evening as the militant group's acting leader gave an address vowing that they would keep fighting.

The rockets fired by the Iran-backed militant group reached as far as the northern Israeli port city of Haifa, injuring one woman and prompting Israeli authorities to warn residents north of the city to stay inside.

The acting leader of the group, Sheikh Naim Kassem, insisted that Hezbollah's military capabilities remained intact despite weeks of Israeli bombardment that has wiped out multiple senior figures.

Speaking by video in an undisclosed location, Kassem said that Hezbollah would soon name a new leader to replace Hassam Nasrallah, who was killed in a targeted Israeli strike on central Beirut.

Israel's military said it deployed a fourth division in southern Lebanon in an apparent widening of their ground incursion, which they launched last week.

Israel said it will keep fighting against Hezbollah until tens of thousands of Israeli residents who have been displaced as a result of hostilities can return to their homes in the north.