A week after a devastating earthquake flattened the Haitian capital, U.S. helicopters landed Tuesday on the grounds of the ruined presidential palace, drawing dozens of Haitians to the compound's wrought-iron gates.

Also Tuesday, U.N. Secretary-General Ban Ki-moon said that the United Nations Security Council has approved a proposal to send an additional 2,000 soldiers and 1,500 police officers to the small country.

After jumping from the helicopters on the palace grounds, some of the U.S. soldiers from the Army's 82nd Airborne Division moved to the capital's general hospital, which is without electricity or running water.

"Our primary purpose is in getting to the population, whether it be the distribution of water, food, or, in this case, where they've got medical treatment going on and they're overwhelmed," Lt. Gen. P.K. Keen, head of U.S. Southern Command, told CNN at the hospital. He said the troops were providing some security there.

Shortly after they arrived, several men carried in a stretcher bearing an injured woman -- a reminder that many are still in dire medical need, even a week after the 7.0-magnitude earthquake.

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Doctors at the hospital used vodka to sterilize the limited medical instruments because there was no rubbing alcohol. Treated patients lay outside with tents made of tarps and blankets providing some shelter.

Formerly vacant buildings were used for treating patients, as the main hospital building had been deemed unsafe.

"We have run out of IVs and IV needles and IV fluids," said Dr. Mark Hyman of Partners in Health. "We've run out of surgical supplies. We have to wash with vodka and we have to operate with hacksaws because we don't have enough operating tools," he said.

The military is going to help with organization and with supplies, he said, emphasizing that he has not experienced any security problems.

"What they want to do is get this hospital operational again," he said. "They want to help us airlift patients out to hospitals where there's plenty of doctors, plenty of supplies, but no patients.

"They're going to help us get electricity, they're going to help us get food. They're going to help us get tents, they're going to help us get all the operating supplies in. ... We don't have the infrastructure to take back this hospital, rebuild it, and that's what they're going to help us do."

Some Haitians welcomed the arrival of U.S. troops. But one man said military force was not needed -- more relief supplies were.

Such frustration appeared to mount Monday, as hundreds of Haitians broke into a damaged store in downtown Port-au-Prince, stripping it clean and then moving on to another store a half-block away.

"Of course on TV we see violent incidents and looting," said Alain Le Roy, the United Nations peacekeeping director.

However, he said, "There is not widespread looting all over the place."

Haitian President Ren

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