Two people have been killed and over a hundred others injured after an Amtrak train slammed into a freight train in South Carolina. Investigators believe the Amtrak train had been directed onto the wrong track. Our correspondent Toby Muse has more.

A speeding train slammed in to a freight train Sunday morning causing an accident that killed two and injured more than a hundred. It was the third fatal train accident in less than two months. The train was traveling overnight from New York to Miami when it slammed in to the other freight train just outside of Columbia, South Carolina. The crash derailed the Amtrak train, which was traveling at 59 miles per hour, and killed both an Amtrak engineer and a conductor. One hundred and sixteen people were treated in hospitals for mostly light injuries. Investigators spent the day at the crash site trying to determine the cause. They believe the Amtrak train had been diverted on to the wrong track. The question is how did it get there?

ROBERT SUMWALT CHAIRMAN, US NATIONAL TRANSPORTATION SAFETY BOARD "Of course key to this investigation is learning why that switch was lined that way because the expectation of course is that the Amtrak would be cleared and would be operating straight down like this."

TOBY MUSE CAYCE, SOUTH CAROLINA "About a hundred meters down this road is the scene of the crash. This is the third since mid-December. Then, a train derailed killing three. Recently, a train collided with a vehicle in Virginia, killing one. As the investigation begins into what caused this accident in South Carolina, questions will be asked in Washington about how to improve safety for all trains in the US. Toby Muse, CGTN, outside Columbia, South Carolina."