BEIRUT, Lebanon - An Israeli drone fired at a convoy of refugees fleeing southern Lebanon on Friday night, killing at least seven people and wounding 22, an Associated Press photographer said. The Israeli military said it was investigating the incident.

The attack on the convoy was the most dramatic on a day of fighting that saw Israeli airstrikes pound south Beirut and border crossings to Syria, killing at least 15 others as ground fighting picked up intensity in the south of the country. An Israeli soldier was killed in fighting in southern Lebanon, the army said.

Hezbollah sent another barrage of more than 150 rockets toward northern Israel. Rescue workers said eight people in the port of Haifa were wounded by shrapnel.

The ongoing clashes have killed more than 800 people ¡ª including at least 741 Lebanese and 123 Israelis.

Lutfallah Daher, the photographer, was with the convoy when it was hit near the Bekaa Valley town of Chtaura, about 30 miles north of the Litani River. Israel has said it would attack any vehicle on roads south of the Litani, assuming it was carrying Hezbollah weapons or fighters.

The photographer said that when the convoy left the Israeli-occupied town of Marjayoun in southern Lebanon, it was made up of more than 600 civilian vehicles in addition to vehicles carrying 350 Lebanese soldiers and police. A few vehicles had left the convoy before it was hit, the photographer said.

Daher lives in Marjayoun and was fleeing with his wife in one car. His mother, brother, sister-in-law and their child were in another car. None was harmed.

Two armored U.N. peacekeeping vehicles were to have accompanied the convoy, Daher said, but were not present when Israeli forces in Marjayoun gave the convoy permission to head north. Israeli tanks and infantry took control of Marjayoun on Thursday.

Israel's military said no convoys had been coordinated with the army.

The region around Marjayoun, a mainly Christian town, was hit by Israeli warplanes and artillery during and after the Israeli advance.

In other developments Friday:

Polls indicated that the Israeli government is losing domestic support for its conduct of the conflict against Hezbollah, and doubt is growing among Israelis that they are winning the war. One survey, by the independent Dahaf Institute, said Olmert's personal approval rating dropped from 73 percent to 66 percent.

The U.N.'s World Food Program said civilians cut off by fighting in south Lebanon find themselves in increasingly desperate conditions as the region remains inaccessible to aid agencies.

U.N. humanitarian chief Jan Egeland said the anger on all sides in the Middle East is the greatest he has seen in two decades of trying to help the troubled region make peace.