The 60-year-old man killed in the crash was identified as Michael Gershon, of Walnut Creek, Calif., said Kaua'i spokeswoman Mary Daubert.

Dania Hansen, of Los Altos, Calif., and Douglas and Judy Barton, of Newport, N.H., were critically injured and taken to Wilcox Memorial Hospital. The Bartons were later transferred to The Queen's Medical Center in Honolulu.

Pilot Donald Torres, 30, was treated for minor injuries.

County firefighters and lifeguards searched the area where witnesses reported seeing the tail rotor falling and the aircraft's body spiraling down. After a sweep of the area, the search was called off due to poor visibility, Daubert said.

The Hughes 500 helicopter operated by Inter-Island Helicopters crashed at about 1 p.m. at a YMCA camp in the remote Ha'ena area shortly after the pilot heard a loud bang and lost control while trying to land, the Federal Aviation Administration said.

FAA spokesman Ian Gregor said the pilot has a clean record with the agency.

The wreckage was covered by a plastic tarp today with only a warped blade visible. A National Transportation Safety Board investigator was scheduled to arrive later in the day.

A makeshift memorial of flowers were placed on a fence around the YMCA's Camp Naue.

It was the second fatal tour helicopter crash in the area in four days. The NTSB is also investigating Thursday's crash of a Heli-USA Airways tour helicopter crash at Princeville Airport that killed four people, including the pilot, and injured three others.

The A-Star helicopter went down shortly after its pilot radioed that he was having problems with the hydraulics. The wreckage was moved to Lihu'e Airport.

Meanwhile, Heli-USA resumed flights today for the first time since its accident. It was the company's second fatal crash on Kaua'i in two years.

The latest crash was also the second for Inter-Island aircraft. On Christmas 2005, one of the company's aircraft crashed into a reservoir near Lihu'e while helping to fight a brushfire, killing the pilot.