NEW ORLEANS — Fights and fires broke out, rescue helicopters and law enforcement officers were shot at and anger mounted across New Orleans on Thursday, as National Guardsmen poured in to help restore order across this increasingly desperate and lawless city.

"We are out here like pure animals. We don't have help," the Rev. Issac Clark, 68, said outside the New Orleans Convention Center, where corpses lay in the open and he and other evacuees complained that they were dropped off and given nothing — no food, no water, no medicine.

Homeland Security Secretary Michael Chertoff said the government is sending in 1,400 National Guardsmen a day to help stop looting and other lawlessness in New Orleans in the wake of Hurricane Katrina. Already, 2,800 National Guardsmen are in the city, he said.

But across the flooded-out city, the rescuers themselves came under attack from storm victims hungry, desperate and tired of waiting.

"Hospitals are trying to evacuate," said Coast Guard Lt. Cmdr. Cheri Ben-Iesan, spokesman at the city emergency operations center. "At every one of them, there are reports that as the helicopters come in people are shooting at them. There are people just taking potshots at police and at helicopters, telling them, 'You better come get my family."'

Some Federal Emergency Management rescue operations were suspended in areas where gunfire has broken out, Homeland Security spokesman Russ Knocke said in Washington. "In areas where our employees have been determined to potentially be in danger, we have pulled back," he said.

A National Guard military policeman was shot in the leg as the two scuffled for the MP's rifle, police Capt. Ernie Demmo said. The man was arrested.

"These are good people. These are just scared people," Demmo said.

Outside the Convention Center, the sidewalks were packed with people without food, water or medical care, and with no sign of law enforcement. Thousands of storm refugees had been assembling outside for days, waiting for buses that did not come.

At least seven bodies were scattered outside, and hungry people broke through the steel doors to a food service entrance and began pushing out pallets of water and juice and whatever else they could find.

An old man in a chaise lounge lay dead in a grassy median as hungry babies wailed around him. Around the corner, an elderly woman lay dead in her wheelchair, covered with a blanket, and another body lay beside her wrapped in a sheet.