US train speeding when it derailed: investigators
May 14, 2015  04:29
The US passenger train was traveling at more than 100 miles per hour -- twice the speed limit -- when it derailed in Philadelphia, investigators said Wednesday, as the death toll from the crash rose to seven.

The National Transportation Safety Board's first assessment of the data came as experts combed through the twisted train cars for more clues about how Tuesday night's wreck occurred.

More than 200 people, including from India, were injured in the crash, which took place along the busy northeast US rail corridor linking Washington and New York, one of the most traveled in the Amtrak network.

Officials warned some of the 243 passengers and crew believed to have been on the train -- many of whom limped away from the wreck bloodied and dazed -- had not yet been accounted for, meaning the death toll could still rise.

The train's "black box" was recovered and sent for analysis, hopefully yielding key information about what went wrong.
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