PHILADELPHIA - Federal accident investigators say an Amtrak train was going over 100 mph prior to a derailment that killed seven people and injured about 200 others in Philadelphia.
The National Transportation Safety Board said in a Twitter message that preliminary data showed the excessive speed, but further calibrations are being conducted.
The derailment took place as the train entered a curve where the speed limit is 50 mph. The speed limit on the track just prior to the curve is 70 mph.
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