The Hezbollah leader Hassan Nasrallah called on Arab countries to apply pressure on U.S. and Western countries to stop Israel's attack on Gaza.
Israel launched major offensive against Palestinian militants in Gaza on Wednesday
A second Gaza war has loomed on the horizon for months as waves of Palestinian rocket attacks and Israeli strikes have become increasingly intense and frequent.
The conflict, launched by Israel with the killing of Hamas's military chief Ahmed al Jabari, poured oil on the fire of a Middle East already ablaze with two years of revolution and an out-of-control civil war in Syria.
Israel says its attack is in response to escalating missile strikes from Gaza. Israel's bombing has not yet reached the saturation level seen before it last invaded Gaza in 2008, but Israeli officials have said a ground assault is still possible.
Egypt's new Islamist President Mohamed Mursi, viewed by Hamas as an ally, led a chorus of denunciation of the Israeli strikes by Palestinian allies and his prime minister, Hisham Kandil, is visiting Gaza on Friday with other Egyptian officials in a show of support for the enclave. Israel promised that the delegation would come to no harm and they will hold fire during his visit.