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Fifteen people were injured when a tram carrying riders at Universal Studios Hollywood struck a guardrail and tossed them from the vehicle on Saturday night.

The incident occurred just after 9 p.m., during the studio backlot tour attraction as the tram was passing the Jurassic Park exhibit.

The vehicle was making a left turn to go northbound on Avenue M when during the maneuver, the last tram car struck a metal guardrail on the right side and tilted, causing several passengers to fall out and onto the road.

According to the California Highway Patrol, 15 passengers were transported to a local hospital with minor to moderate injuries.

The cause of the collision remains under investigation, but authorities have confirmed that alcohol and drugs are not considered factors in the crash. Officials with the California Highway Patrol will be leading the investigation.

  • UNIVERSAL CITY, CA - FEBRUARY 12: The studio tram tour passes an old tram as it enters King Kong 360 3-D at Universal Studios Hollywood in Universal City on Monday, Feb 12, 2018. (Photo by Jeff Gritchen/Digital First Media/Orange County Register via Getty Images)
  • Universal Studios Hollywood
  • Universal Studios Hollywood
  • Universal Studios Hollywood
  • Universal Studios
  • Universal Studios Hollywood

A Universal Studios spokesperson provided a statement to KTLA saying:

“There was a tram incident at the theme park tonight that resulted in multiple minor injuries, confirmed by the LA County Fire Dept. We are working to support our guests and understand the circumstances that led to the accident.”

The Studio Tour remains one of the theme park’s most popular attractions, taking riders on a one-hour backlot tour of some of the most iconic film and television sets in Hollywood history.

Throughout the tour, guests experience several interactive elements including animatronics, 3-D motion, sound stages with special effects, and more.

The attraction is celebrating its 60th Anniversary celebration this year after debuting in 1964.

Officials implemented some new attractions along the tour route on Friday and planned to add new features to the ride through Aug. 11. Some of the updates include an immersive photo-op, special throwback tram cars, and an original replica of the famous Hollywood sign.