The Associated Press reports that:

A 15-foot pipe fell off a skyscraper being dismantled near the World Trade Center site and plunged through the roof of a nearby firehouse Thursday, injuring two firefighters … Demolition work was stopped on the 40-story former Deutsche Bank building after the sprinkler pipe fell from the 35th floor onto Engine 10/Ladder 10. The firehouse was nearly destroyed in the Sept. 11, 2001, attacks. Six of its firefighters were among the 343 killed responding to the burning World Trade Center, and a bronze memorial to all the firefighters who died is now affixed to the building.

The neighboring skyscraper, being dismantled floor by floor, was heavily damaged when one of the twin towers collapsed into it. Cleanup of toxic material in the building began in 2005, and work to dismantle it began late last year … Two firefighters were treated for minor injuries and released, fire officials said. The firefighters weren’t hit by the pipe, the department said.