Hezbollah threatened Tuesday to attack targets across Israel and said it would not be defeated by ongoing intense bombardment of its strongholds and leadership.
In the latest exchanges during the conflict, the group said it launched a barrage of rockets towards the northern Israeli city of Haifa, while Israel carried out air strikes in several areas of Lebanon.
A defiant Hezbollah "will not be defeated" in its war with Israel, the group's deputy chief Naim Qassem said in a speech.
"Since the Israeli enemy targeted all of Lebanon, we have the right from a defensive position to target any place" in Israel, "whether the center, the north or the south," he said.
"I am telling the Israeli home front: the solution is a ceasefire," he added.
Iran, which supports Hezbollah, has in recent days engaged in diplomatic talks around establishing a ceasefire in Lebanon and war-battered Gaza amid growing fears of a broader regional conflict.
Lebanon's Prime Minister Najib Mikati told AFP that his country was ready to bolster its military presence in the south after any ceasefire, adding that Israeli troops were making brief cross-border incursions.
Security has been tightened in the country's only airport in Beirut "to remove any pretexts" for an Israeli attack, Mikati added.
Israel has also been intensifying its offensive in the besieged Gaza Strip, which the United Nations warned Tuesday is suffering under its worst aid restrictions since the war there began over a year ago.