UPDATE II: NBC News has updated its report to say that there was no fire at One World Trade Center this morning. The smoke that spurred a civilian to report a fire at the building was caused by welding equipment, which was working properly.

UPDATE: Can both reports of a fire at One World Trade Center this morning be correct? The Christian Science Monitor's Ron Scherer reports that two accounts are unfolding in the report of a fire on the skyscraper's 88th floor this morning.

In one, Port Authority spokesman Steve Coleman says that there was no fire. "The FDNY searched the building and found nothing," Coleman told The Christian Science Monitor. "My construction guys are telling me there never was any fire."

In the other account, there seemingly was a fire. "There seemed to be a fire in the welding operation," an FDNY spokesperson told Scherer. "Wait for the fire marshall to investigate. It is definitely under investigation—call back later."

It appears in this case that journalists rushing to report the news are not responsible for the conflicting reports.

ORIGINAL STORY FOLLOWS:

A report of a fire on the 88th floor of One World Trade Center this morning has been called a false alarm—and not the first such alarm at the site.  

NBC News reported that 90 firefighters were called out to the new Financial District skyscraper early this morning to put out a blaze on the 88th floor. New York fire chief Kevin Brennan told NBC News that welding equipment caught fire and that firefighters easily put it out.

The Huffington Post later reported that a Port Authority official said that there was "zero evidence" of a fire, calling the incident a false alarm. In that story, The Huffington Post noted another incident from April, in which Two World Financial Center was evacuated after a fake hand grenade was delivered to the building.

One World Trade Center, which is still under construction, will rise 1,776 feet from its base to the top of its spire upon completion, making it the largest building in New York and in the Western Hemisphere. 

Publisher Condé Nast has leased some 1.2 million square feet across 25 floors in the building. The U.S. General Services Administration has secured another 270,000 square feet in the building, which aims to achieve LEED Gold certification.

This post will be updated.