(Cayce, SC) -- Federal investigators are looking into a deadly train crash the NTSB blames on tragic human error.
Two Amtrak crew members died this weekend and more than 100 passengers were hurt when their train collided with a CSX freight train parked on the tracks in Cayce.
The NTSB says the passenger train went off course when a switch was set to the wrong position.
Yesterday, the NTSB retrieved the Amtrak data recorder, and several agencies started interviewing CSX employees.