VANCOUVER - British Columbia's work-safety agency says a film production company "failed" to ensure the safety of workers on the set of "Maze Runner: The Death Cure"' when actor Dylan O'Brien was injured in March.

WorkSafeBC says a worker was injured March 17 after a change to an action sequence in the film.

After the incident in B.C.'s interior, 20th Century Fox said O'Brien was immediately transferred to a Vancouver hospital and that production on the film would be shut down while he recovered.

Director Wes Ball tweeted after the accident that O'Brien would finish shooting the latest instalment of the popular franchise a few weeks after recovering. However, it's unclear if filming for the movie has resumed and a spokesman in Los Angeles said Monday that Ball was out of the country.

No one from 20th Century Fox could be reached for comment on Monday.

But in a report filed with WorkSafeBC by Fox U.S. Productions 49 Inc. the company says the scene was rehearsed before the accident and a safety meeting was held.

The Employer Incident Investigation Report, which refers to the person injured only as "the actor," was released by WorkSafeBC. The safety agency also released its Inspection Report and it only refers to the person who was injured as "the worker."

It isn't clear from the reports what the actor was doing at the time of the accident, but the Inspection Report says the scene involved a trailing and leading vehicle.

"The transition from the trailing vehicle to the leading vehicle was changed to be done in one sequence instead of two," it says. "When the change was made to the sequence there was no meeting held to review the changes with all involved."

The report alleges that the change increased the risk of injury.

"The sequence now relied upon driver co-ordination and performance to keep the vehicles close enough during the transition, as the worker making the transition would end up rigged to the trailing vehicle but physically riding on the back of the leading vehicle," the report says.

But the Employer Incident Investigation Report says the scene was "thoroughly rehearsed and successfully completed" about five times before the accident.

The report by the employer says an animated version of the sequence and storyboards were used before filming was done to ensure the scene was shot safely.

"Prior to filming there was a thorough review of the script, including how each scene would be shot," says the report, which is filed by employers after a worker is injured on the job.

"Several training sessions were held and rehearsals were successfully conducted before the sequence was shot in which all equipment to be used, including safe operating perimeters for the sequence, were assessed to ensure safe operating conditions."

The nature of the actor's injuries were redacted from the report.

O'Brien was filming the dystopian science-fiction series at the airport in Cache Creek, about 340 kilometres northeast of Vancouver.

He is also known for his co-starring role in the MTV series "Teen Wolf."

Celebrity website TMZ and Hollywood trade publication Variety reported that O'Brien was hit by a car and suffered multiple injuries.

O'Brien's publicist was not immediately available for comment on Monday.

WorkSafeBC has ordered the company to prepare a notice of compliance report by Wednesday.