A Fallen tree branch appears to have caused the Ninja roller coaster to derail Monday at Magic Mountain, stranding riders for nearly three hours before they were rescued.

Fire Inspector Fred Flores told The Times that the incident occurred when the coaster struck a branch that was lying on the track, derailing the first car.

The Ninja will remain closed while inspectors survey the track and surrounding area.

Authorities say a tree branch that fell on the tracks of a roller coaster at Six Flags Magic Mountain is to blame for injuring four people and leaving riders stranded for nearly three hours Monday evening.

Videos of the incident show that the coaster stands amid a heavy growth of trees, with some branches touching the supports holding up the roller coaster.

For the full article please visit LATIMES.com or click here…. Magic Mountain roller coaster derailment: Probe focuses on tree branch – Los Angeles Times.