Israeli warplanes again also smashed runways at Beirut's airport with hours of airstrikes, trying to render it unusable, and destroyed mountain bridges on the main highway to Syria. Warships blockaded Lebanon's ports for a second day.
Smoke drifted over the capital after strikes exploded fuel tanks at one of Beirut's two main power stations, gradually escalating the damage to Lebanon's key infrastructure. Apartment buildings were shattered by strikes in south Beirut.
Hezbollah said the residence and office of its leader, Sheik Hassan Nasrallah, were destroyed, but Nasrallah, his family and bodyguards were all safe.
Nasrallah, whose movements are treated with a high level of secrecy, moves from one place to another, particularly during the Israeli offensive.
In an audio tape released after the destruction of Hezbollah headquarters, Nasrallah said that his group is ready for "total war" with Israel and threatened to sink an Israeli warship that has been shelling Beirut.
Nasrallah addressed himself to Israelis, saying: "You wanted an open war and we are heading for an open war. We are ready for it."
The rocket into Israel hit the town of Meron, Zaki Heller, a spokesman for the rescue services, said. An Israeli government official called Friday's almost continuous barrage of Hezbollah rockets "a major escalation."
Meanwhile, at the southern end of Gaza, hundreds of Palestinians poured into the Gaza Strip from Egypt on Friday after militants blew a hole in the border wall. The border has largely been closed since June 25, when Palestinian militants carried out a cross-border raid on a military outpost, killing two Israeli soldiers and capturing one. Hundreds of people have been stranded on the Egyptian side of the border, unable to get to their homes in Gaza.
In addition to his threat of total war with Israel, Nasrallah added, "The surprises that I have promised you will start now. Now in the middle of the sea, facing Beirut, the Israeli warship that has attacked the infrastructure, people's homes and civilians, look at it burning."
An Israeli army spokesman said that an Israeli naval ship had been hit in Lebanese waters, apparently by a rocket. The spokesman said the damage was not serious and that there were no injuries. He would not say where the ship was located.
In other developments:
Israel's army chief said Friday that Hezbollah guerrillas have rockets that can reach as much as 40 miles or more, an admission that brings more major cities within their range.
In comments that were aired live on Israeli television, Brig. Gen. Dan Halutz also put the blame squarely on Lebanon's government for the numerous rocket attacks on northern Israel that have killed four people and injured several more.
Israeli jets also struck the Beirut-Damascus highway again, this time in the town of Chtaura in the Bekaa Valley in eastern Lebanon. Two missiles hit a main intersection on the edge of the market town that connects central, northern and southern parts of the Bekaa with central Lebanon.
Residents of Haifa, Israel's third largest city and a major port, were ordered into bomb shelters as evening fell Friday, following rocket attacks throughout the day, even though Haifa is some 18 miles south of the border with Lebanon.
Residents were shocked when the first attacks hit Haifa Thursday: No guerrilla rocket had ever reached that far into Israel.
Throughout the country, two Israelis have been killed and dozens wounded by the more than 60 rocket attacks since Wednesday.
Along Israel's northern border, hundreds of thousands of people now are living in bomb shelters, reports CBS News correspondent Richard Roth. Hundreds of Hezbollah rockets have fallen there in the last two days, and Israelis are stocking up. They don't expect it will end soon.
Israeli fighter bombers also blasted the airport for a second day, ignited fuel storage tanks and cut the main highway to Syria.
President Bush promised Lebanon's leader Friday that he would urge Israel to avoid civilian casualties and damage as it steps up attacks on its neighbor. But Mr. Bush's promise to Lebanese Prime Minister Fuad Saniora fell short of his request for pressure for a cease-fire, according to an account from Saniora's office.
"At this point, the Israeli leaders have been consulted. They've been consulted by the secretary of state and the national security adviser," White House spokesman Tony Snow told reporters in St. Petersburg, Russia. "The president has not expressed any plans to speak with the (Israeli) prime minister but should it become necessary, he will."
The president also talked to the leaders of Jordan and Egypt, reports CBS News White House correspondent Peter Maer.
Beirut airport officials said one of their three runways was hit by two Israeli missiles at mid-morning Friday. The airport had been closed since Israeli fighter-bombers struck its runways early Thursday.
With aviation fuel on fire and runways in ruins, Israel has been choking off transport in and out of Lebanon, reports Roth. Bombs hit the highway linking Beirut with the Syrian capital of Damascus. Travel is only possible now along tortuous mountain detours.
Debbie Nassif, a Lebanese-American who has been visiting her family in the Bekaa Valley, is stranded.
"I was leaving tonight. And now, I have no clue how I'm going to leave, when I'm going to leave, from where," Nassif said. "We can't even go to the Syrian border, because we called the U.S. and Canadian embassies, and they recommend not going to the Syrian border."
A senior State Department official said the best advice for the moment is for American citizens to stay where they are and to let the U.S. Embassy in Beirut know how to reach them if they have not already done so, reports CBS News' Charles Wolfson.
Israel says the air and naval blockade will remain in force until Hezbollah is driven out of South Lebanon, reports CBS News correspondent Robert Berger.
The overnight death toll brought to 61 the number of people killed since Wednesday when Israel began retaliating for the capture of two Israeli soldiers by Hezbollah guerrillas in a raid across the southern Lebanese border. Sixty of those have been civilians, only one a militant, Lebanese authorities say.
"Hezbollah wants to assert its primacy in the anti-Israeli forces. Iran and Syria are clearly using Hezbollah as a vehicle to get at Israel," Richard N. Haass, president of the Council on Foreign Relations, said on CBS News' The Early Show.
Israel's offensive had several goals: to pressure Hezbollah to release the Israeli soldiers, to push the guerrilla group away from Israel's northern border and to exact a price from Lebanon's government for allowing Hezbollah to operate freely in the south.