"This is preliminary information from the event recorders, shows that the train was traveling at approximately 82 miles per hour as it went into a 30 mile an hour curve," the NTSB's Earl Weener announced at a Monday afternoon press conference.
Investigators plan to talk with the driver and conductor of the train as well.
The conductor has said there was a problem with the brakes as the train entered a sharp turn along the Harlem and Hudson Rivers.
There were about 100 people riding the train at the time of the crash.
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