Israel's military continued to strike southern Lebanon for a second day on Tuesday, killing at least 560 people and displacing thousands, as it claimed to have killed a Hezbollah commander.

Families that fled southern Lebanon flocked to Beirut and the coastal city of Sidon, sleeping in schools turned into shelters, as well as in cars, parks and along the beach. Some sought to flee the country, causing a traffic jam at the border with Syria.

Issa Baydoun fled the village of Shihine when it was bombed and drove to Beirut with his extended family. They slept in vehicles on the side of the road because the shelters were full.

"We struggled a lot on the road just to get here," said Baydoun, who rejected Israel’s contention that it hit only military targets. "We evacuated our homes because Israel is targeting civilians and attacking them."

Well-wishers offered empty apartments or rooms in their houses in social media posts. Volunteers set up a kitchen to cook for the displaced at an empty Beirut gas station that first became a hub for volunteers after a devastating port explosion in 2020.

Israel said late Tuesday that fighter jets carried out "extensive strikes" on Hezbollah weapons and rocket launchers across southern Lebanon and in the Bekaa region to the north.

Asked about the duration of Israel’s operations in Lebanon, military spokesman Rear Adm. Daniel Hagari said at a news conference that it aims to keep them "as short as possible, that’s why we’re attacking with great force. At the same time, we must be prepared for it to take longer."

Tensions between Israel and the Lebanese group Hezbollah have steadily escalated over the last 11 months. Hezbollah has been firing rockets, missiles and drones into northern Israel in solidarity with Palestinians in Gaza and its ally Hamas.

Israel has responded with increasingly heavy airstrikes and the targeted killing of Hezbollah commanders while threatening a wider operation.

Israel said a strike in Beirut Tuesday had killed Ibrahim Kobeisi, who it said was a top Hezbollah commander with the group's rocket and missile unit. Military officials said Kobeisi was responsible for launches toward Israel and planned a 2000 attack in which three Israeli soldiers were kidnapped and killed.

It was the latest in a string of assassinations and setbacks for Hezbollah, the strongest political and military actor in Lebanon and widely considered the top paramilitary force in the Arab world. The group offered no immediate comment on the Israeli claims.

Lebanon’s Health Ministry said six people were killed and 15 were wounded in the strike in a southern Beirut suburb. The country’s National News Agency said the attack destroyed three floors of a six-story apartment building.

The U.N.’s High Commissioner for Refugees in Lebanon said one of its staffers and her young son were among those killed Monday in the Bekaa region, while a cleaner under contract was killed in a strike in the south.

Hezbollah said it launched missiles at eight sites in Israel, including an explosives factory in Zichron Yaakov, 60 kilometers (37 miles) from the border.

Hagari, the Israeli military spokesman, said 300 rockets were fired at Israel on Tuesday, injuring six soldiers and civilians, most of them lightly.

The renewed exchange came after Monday's barrages racked up the highest death toll in any single day in Lebanon since Israel and Hezbollah fought a bruising monthlong war in 2006.

On Tuesday, mourners carried 11 bodies through the streets of the Lebanese village of Saksakieh, some 40 kilometers (25 miles) north of the Lebanon-Israel border, including those of four women, an infant and a 7-year-old girl. All were killed in Israel’s bombardment of the village Monday.

Some of the bodies were draped in Hezbollah flags, others were wrapped in black clothes. A wreath of flowers was placed on top of the smallest one.

Mohammad Halal, father of 7-year-old Joury Halal, said his daughter was an "innocent child martyr."

"She is a martyr for the sake of the south and Palestine," Halal said.

Israel claimed it targeted sites where Hezbollah had stored weapons. Data from American fire-tracking satellites analyzed Tuesday by The Associated Press showed the wide range of Israeli airstrikes aimed at southern Lebanon, covering an area of over 1,700 square kilometers (650 square miles).

NASA’s Fire Information for Resource Management System typically is used to track U.S. wildfires, but can also be used to track the flashes and burning that follow airstrikes. Data from Monday showed significant fires across southern Lebanon and in the Bekaa Valley.

The Lebanese Health Ministry said at least 564 people have been killed in Israeli strikes since Monday, including 50 children and 94 women, and that more than 1,800 have been wounded - a staggering toll for a country still reeling from a deadly attack on communication devices last week.

Nearly a year of fighting between Hezbollah and Israel had displaced tens of thousands of people on both sides of the border before this week's escalation. Israel has vowed to do whatever it takes to ensure its citizens can return to their homes in the north, while Hezbollah has said it will keep up its rocket attacks until there is a cease-fire in Gaza, which appears increasingly remote.

The Israeli military says it has no immediate plans for a ground invasion but is prepared for one, after moving thousands of troops who had been serving in Gaza to the northern border. It says Hezbollah has launched some 9,000 rockets and drones into Israel since last October, including 250 on Monday alone.

The military said Israeli warplanes struck 1,600 Hezbollah targets Monday, destroying cruise missiles, long- and short-range rockets and attack drones, including weapons concealed in private homes.

Israel estimates Hezbollah has some 150,000 rockets and missiles, including guided missiles and long-range projectiles capable of striking anywhere in Israel.

Monday's escalation came after a particularly heavy exchange of fire Sunday. Hezbollah launched around 150 rockets, missiles and drones into northern Israel in retaliation for strikes that killed a top commander and dozens of fighters.

Last week, thousands of communications devices, used mainly by Hezbollah members, exploded in different parts of Lebanon, killing 39 people and wounding nearly 3,000, many of them civilians. Lebanon blamed Israel, but Israel did not confirm or deny responsibility.