Amtrak Train Was Traveling 106 mph Before Crash, Says NTSB

The speed limit at the site of derailment is 50 mph. Investigators from the National Transportation Safety Board are at the site of an Amtrak crash in Philadelphia today trying to determine the cause of Tuesday night's derailment.
1:32 | 05/13/15

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Transcript for Amtrak Train Was Traveling 106 mph Before Crash, Says NTSB
Here in the daily the true scope of the crash is revealed. It happened just after 930 Tuesday night and ordinary train ride from DC to New York turned deadly. The impact so sudden passengers were tossed like rag dolls. Tumbling not sure what what's down sitting anybody you just feel things hitting you. You know you're trying to figure out how to get that's. Davids was in the third car you can see it here on its side. Another train car crumpled like tin can't seven cars including the engine thrown from the tracks. At least five passengers were pronounced dead illness seen a six dying at the hospital we attempted to resuscitate person. And now investigators from the National Transportation Safety Board are on the scene recovering the black box from among the crumpled remnants of twisted metal. The black box it is now in the Amtrak operates a senator. In Delaware four analysis we have no information. From that particular device. At all because it is currently being analyzed provide the experts. The train operator is alive and talking to authorities as they evaluate among other things the train's speed what was the trains read what was the speed limit on that her. That's part of our investigation is two very carefully document that. And now the NTSB says that they are evaluating the potential signal problems mechanical failure and the possibility of human hair. Reporting in Philadelphia along as act ABC news.

This transcript has been automatically generated and may not be 100% accurate.

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