Tyre, Lebanon ? Israel shut down south Lebanon with a threat to blast any moving vehicles Tuesday as ground fighting intensified, airstrikes killed at least 19 civilians and Arab governments called for a full Israeli withdrawal as a condition of any cease-fire.

With U.S., French and Arab negotiators meeting into the evening at the United Nations, Israel voiced cautious interest in a Lebanese proposal to deploy 15,000 soldiers to control the ground in south Lebanon where Hezbollah has been firing missiles into Israel. But the warring sides appeared to be some distance apart on the text of a possible resolution, now not expected to come before the Security Council before Thursday.

After four weeks of fighting, nearly 800 people have died on both sides. Rescuers in Lebanon pulled 28 additional corpses from the wreckage of Monday’s attacks, raising that day’s toll to 77 Lebanese – the deadliest single day of the war.

Early today, Israeli’s military targeted Lebanon’s largest Palestinian refugee camp from the air, killing at least one person and wounding three others. Lebanese and Palestinian officials said an Israeli gunship shelled the Ein el-Hilweh camp, but Israel’s military said the airstrike targeted a house used by Hezbollah guerrillas.

Hezbollah’s Al-Manar TV reported that two Palestinians were killed and eight others were wounded in the attack. It said the victims’ bodies were pulled from under the rubble of a house destroyed in the bombing.

Israeli soldiers examine a map on Monday before entering Lebanon from northern Israel.

In Tyre, part of the south Lebanon region where Israel declared the no-drive zone, only pedestrians ventured into the streets. Country roads and highways were deserted throughout the region because of the Israeli threat. Although Israel said it would not attack humanitarian convoys, the U.N. was not taking any chances.

“There are two words that sum up where the humanitarian situation is, and these are ‘not enough,”‘ said Wivina Belmonte of the U.N. Children’s Fund. “Fuel supplies are not enough, hospitals are on life support, supplies of humanitarian goods trying to get into the country are not enough.”

At least 160 Hezbollah rockets hit northern Israel, most of them in and around the towns of Nahariya, Kiryat Shemona, Maalot and Safed. No Israeli civilians were killed.

Some of the fiercest ground fighting raged around the village of Bint Jbail, a Hezbollah stronghold that Israeli has tried to capture for weeks. Three Israeli soldiers were killed there Tuesday, the military said, claiming 35 Hezbollah guerrillas died in the fighting. Hezbollah would not confirm any deaths.

The issue of who will patrol southern Lebanon, where Hezbollah militants have been operating in their fight against Israel, has become the dominant sticking point in cease-fire negotiations at the United Nations.