ORLANDO, Fla. (AP) — Two construction workers fell to their deaths when scaffolding collapsed above the sixth floor of a hotel under construction near Disney World early Wednesday. A third worker managed to hang on and climb to safety, a fire-rescue spokesman said.

The accident happened just outside Disney property, Orange County Fire Rescue spokesman Mike Jachles said.

"They were on the scaffolding, and for reasons unknown at this time, that support structure gave way, sending two workers plummeting to the ground below. Both died on the scene. A third worker managed to hang onto the scaffolding and managed to climb to safety," Jachles told The Associated Press.

Marriott International has described the project as a 16-story, $282 million JW Marriott Orlando Bonnet Creek Resort, featuring 516 rooms near Orlando's popular theme parks. It's owned and developed by DCS Investment Holdings, a private equity group based in West Palm Beach, Florida, which is owned by Dwight C. Schar, co-owner of the Washington Redskins.

Fire-Rescue got the call at about 4:15 a.m., when about 18 workers were at the scene.

Jachles said it happened at the top of the construction project, which is still in the concrete-pouring stage. The Orange County Sheriff's office and the U.S. Occupational Safety and Health Administration will investigate, he said.

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25 PHOTOS Old photos of Disney World See Gallery Old photos of Disney World (Original Caption) Disney: Pastel colored castle, where 'Sleeping Beauty was awakened by the Prince's kiss,' is the entrance to Fantasyland. Here also are the diamond minews of the Seven Dwarfs, Alice in Wonderland's looking glass world, and the habitat of many other characters in Walt Disney's famed cartoons. THE GRAND OPENING OF WALT DISNEY WORLD -- Pictured: Goofy, Pluto, Julie Andrews, Pinocchio performs on Main Street U.S.A. in the Magic Kingdom -- Photo by: NBCU Photo Bank THE GRAND OPENING OF WALT DISNEY WORLD -- Pictured: Mickey Mouse (center) with Disney World cast members -- Photo by: NBC/NBCU Photo Bank THE GRAND OPENING OF WALT DISNEY WORLD -- Pictured: Julie Andrews (center) performs on Main Street U.S.A. in the Magic Kingdom -- Photo by: NBCU Photo Bank 4th August 1972: A topiary model of an elephant at Disney World, Florida. (Photo by Alan Band/Keystone/Getty Images) December 1960: Entrance to Adventureland at Disneyland, California. (Photo by Alan Band/Keystone Features/Getty Images) (Original Caption) Prime Minister Nehru, of India, is shown as he toured Disneyland, World Famous amusement park, accompanied by Walt Disney, who drove the Prime Minister in an old fashioned electric vehicle. Prime Minister Nehru will spend the next two days in the Los Angeles area as part of his visit to the United States. 31st October 1969: Landscape artist Charlie Sepulveda creating life size topiary Disney characters for the Walt Disney World entertainment centre in Orlando, Florida (Photo by Alan Band/Keystone/Getty Images) 13th November 1969: The first phase of Walt Disney World under construction at Orlando, Florida. Covering 27,000 acres, it is the world's largest recreation centre. (Photo by Alan Band/Fox Photos/Getty Images) THE GRAND OPENING OF WALT DISNEY WORLD -- Pictured: Julie Andrews performs in front of Prince Charming Regal Carrousel in the Magic Kingdom -- Photo by: NBC/NBCU Photo Bank THE GRAND OPENING OF WALT DISNEY WORLD -- Pictured: Julie Andrews (center) performs on Main Street U.S.A. in the Magic Kingdom -- Photo by: NBCU Photo Bank THE GRAND OPENING OF WALT DISNEY WORLD -- Pictured: Julie Andrews on Main Street U.S.A. in the Magic Kingdom -- Photo by: NBC/NBCU Photo Bank APR 7 1972, APR 10 1972; Denver-Made Dune Buggies Heading for Disney World; Gail Kauffman of Unique Mobility Inc., manufacturer of The Englewood firm recently bought a half-interest in a dune buggies at 3730 S. Jason St., Englewood, perches leisure-car rental operation at Orlando - home of Disney on one of the 21 units ready to be loaded onto Santa Fe World - and will manage the operation with a fleet of 70 rail cars over the weekend for a trip to Orlando, Fla. dune buggies, all being shipped by rail from Denver.; (Photo By Bill Johnson/The Denver Post via Getty Images) THE GRAND OPENING OF WALT DISNEY WORLD -- Pictured: Julie Andrews on Main Street U.S.A. in the Magic Kingdom (Photo by NBC/NBCU Photo Bank via Getty Images) ORLANDO, FL - DECEMBER 1: Boston College Cheerleaders along with the BC band perform out in front of the Cinderella Castle at in the Magic Kingdom at Walt Disney World in Orlando, December 1982. BC was in town to play Auburn in the Tangerine Bowl. (Photo by John Tlumacki/The Boston Globe via Getty Images) US Secretary of Education William Bennett, his wife Elayne, son John and an unidentified woman and girl, waving flags and parading down Main Street USA in an old-fashioned fire truck while on a visit to Disney World. (Photo by Robert Sherbow/The LIFE Images Collection/Getty Images) THE MAGICAL WORLD OF DISNEY -- 'Disneyland's 35th Anniversary Celebration' Episode 15 -- Pictured: (l-r) Roy E. Disney, Michael Eisner, Ronald Reagan, Art Linkletter, Robert Cummings -- (Photo by: Alice S. Hall/NBC/NBCU Photo Bank via Getty Images) Warren Beatty and Ron Galella during Press Conference For 'Dick Tracy' at Disney World in Orlando, Florida, United States. (Photo by Ron Galella, Ltd./WireImage) Crowds at Main Street of Disney World (Photo by Jonathan Blair/Corbis via Getty Images) Crowds Waiting in Line at Disney World (Photo by Jonathan Blair/Corbis via Getty Images) Group portrait of entire Walt Disney World staff, including cast of costumed Disney characters in fore, standing in front of Cinderella Castle prior to the grand opening of the amusement park. (Photo by Yale Joel/The LIFE Picture Collection via Getty Images) UNSPECIFIED - OCTOBER 15: LIFE cover 10-15-1971: Disney World opens. (Photo by Yale Joel/The LIFE Premium Collection/Getty Images) Views of Disney World's Skyway multicolored cable cars passing over Fantasyland on way to Tomorrowland. (Photo by Ray Fisher/The LIFE Images Collection/Getty Images) Disney World in Florida: exterior of Cinderella's Castle lit up at night and reflected in artificial stream. (Photo by Ray Fisher/The LIFE Images Collection/Getty Images) Interior of the Contemporary Resort Hotel's Grand Canyon Concourse lobby, whose ceiling is 14 stories high and has monorail terminal (background) ,at Disney World. (Photo by Ray Fisher/The LIFE Images Collection/Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

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