NEW YORK (CNN) -- A steam pipe burst in midtown Manhattan Wednesday, causing a transformer to explode and sending thick plumes of steam and ash into the air near Grand Central Terminal, New York officials said.
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A transformer exploded in Manhattan during rush hour Wednesday.
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Hundreds of people fled as dozens of police, fire and utility workers arrived. The blast left a huge crater, witnesses said.
New York Presbyterian hospital said it had received three people with injuries related to the explosion. Two of those patients were critically injured.
Video from the scene showed steam and mud spewing from underground and a small school bus with its windows and a door blown out.
Jim Margolin in the FBI's New York office said there is no indication there is anything "suspicious" about the explosion, though the FBI is still collecting information from city agencies and officials.
"A steam explosion on East 41 Street from Third and Lexington Avenue is not terrorist-related," said New York Police Department Deputy
