A roller coaster derailed and struck a tree at Six Flags Magic Mountain yesterday evening, leaving four people injured and over 20 stranded some 20 feet off the ground. 

KTLA reports that a branch fell onto the track of the "Ninja" ride, interrupting its movement. The LAFD was summoned to free the riders, who were brought down around 8 p.m. after being stuck for close to an hour. KTLA adds that two of the injured were hospitalized as a safety precaution. 

A statement posted on Six Flags' website states that the Ninja has been shut down for the moment.

[via KTLA]

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