U.S. investigators combed through wreckage of a passenger train that derailed in the northeastern city of Philadelphia, Pennsylvania on Tuesday evening killing at least six people and injuring more than 140 others.
ລົດໄຟໂດຍສານ ຕົກລາງ ໃກ້ Philadelphia
![Officials survey the site of a derailed Amtrak train in Philadelphia, May 13, 2015.](https://gdb.voanews.com/a1888eb6-f9c3-498e-93e8-1c09a924faa4_w1024_q10_s.jpg)
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Officials survey the site of a derailed Amtrak train in Philadelphia, May 13, 2015.
![Emergency personnel work at the scene of a train wreck, in Philadelphia, May 12, 2015.](https://gdb.voanews.com/cc8349ad-eb92-4e8c-a20c-758df2e40abe_w1024_q10_s.jpg)
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Emergency personnel work at the scene of a train wreck, in Philadelphia, May 12, 2015.
![Emergency personnel help passengers at the scene of a train wreck, in Philadelphia, May 12, 2015.](https://gdb.voanews.com/6b590658-7208-4a9a-8283-d5daf8c7df4f_w1024_q10_s.jpg)
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Emergency personnel help passengers at the scene of a train wreck, in Philadelphia, May 12, 2015.
![Emergency personnel at work after the Amtrak train derailment in Philadelphia, May 12, 2015.](https://gdb.voanews.com/b62c6902-611a-4527-ba53-4d1879567728_w1024_q10_s.jpg)
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Emergency personnel at work after the Amtrak train derailment in Philadelphia, May 12, 2015.