New York City firefighters have been called to the World Trade Center site, where one or two workers are stuck on scaffolding that's about 50 stories above street level.

The problem was unfolding around 1 p.m. Wednesday at 1 World Trade Center, the nation's tallest skyscraper. Television images showed one side of the scaffolding had dropped at a sharp angle.

The Fire Department of New York said further information was not immediately available.