Norfolk Southern and its contractors worked through the day on Friday to assess the derailment site in eastern Warren County where a railroad company spokesperson said 14 rail cars and five locomotives left the tracks.

As of 6 p.m. Friday, seven of the 14 cars had been cleared. Work continued through the night to clear the remaining cars and begin repair work to the track.

The company worked overnight Friday to repair siding track, and work continued through the day Saturday to remove the locomotives and repair the mainline track to allow traffic to pass through safely.

The cause of the derailment is still being investigated, the company said on Monday.