The Associated Press

DALLAS (AP) - A construction worker fell 23 stories to his death Thursday after the scaffolding on which he worked gave way.

The fatal plunge happened at the Saint Ann Court high-rise office building project. Witnesses say the man was installing hardware on the facade of the 23rd floor of the 26-story, 333-foot structure when he took the fatal plunge about 2:30 p.m. Thursday.

Dallas fire-rescue spokesman Jason Evans tells KDFW-TV of Dallas and Fort Worth reports that the 35-year-old man was the only one on the scaffold. His identity hasn't been released.

Evans hasn't returned a page from The Associated Press.

U.S. Occupational Safety and Health Administration is investigating.

Information from: KDFW-TV,