US federal investigators have begun searching for clues that might explain a deadly collision between a train and a SUV on Tuesday evening north of New York City which left 6-people dead.
Fifteen others are still in hospital after a commuter train slammed into an SUV, triggering an explosion and fire.
The National Transportation Safety Board is trying to figure how the driver of the vehicle became stuck in between the two crossing arms on the track.
Robert Sumwalt is the vice chair of the NTSB.
"We intend to find out not only what happened, but we want to find out why it happened, and our sole purpose for being here is to find out what happened so that we can offer recommendations to hopefully keep this from happening again and that's why we're here."
Officials have been using dental records to try to identify the badly-burned victims.
