The FDNY now believes the initial report of a fire, which came in around 8 a.m., may have been from a construction worker's welding torch. The emergency call was made by a member of the public.
Nearly 100 firefighters searched the building, checking all floors that are under construction, from the top down to the 50th floor, to ensure that there was no fire condition.
There were no reports of any injuries.
Barclay Street was closed between West Street and Greenwich Street.
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