Another incident in Germany has put Tom Cruise's Second World War-era film about a famous Adolf Hitler assassination plot into the headlines once again.

German police said on Monday that 11 of the film's extras were sent to hospital after they were injured during filming.

Tom Cruise has been under fire for the film, in which he plays German hero Col. Claus von Stauffenberg, who led a failed attempt to kill Adolf Hitler in July 1944
(Stuart Ramson/Associated Press)

The 11 men fell off the back of a truck as it drove through central Berlin on Sunday night. Police attributed the accident to a loose bolt on the side panel of the truck.

Filming stopped after the accident and 10 of the men required simple outpatient treatment, authorities said. One man remained in hospital.

"No one suffered anything more serious than cuts and bruises, though one of the extras was kept in the hospital overnight for observation," United Artists, the studio behind the film, said a statement released Monday.

The studio also said that the movie's main production unit, which includes director Bryan Singer and Cruise himself, wasn't filming at the time of the accident. The incident "is not expected to have any impact on the production schedule."

Tentatively titled Valkyrie, the movie tells the story of Col. Claus von Stauffenberg, who led a failed attempt to kill Adolf Hitler in July 1944.

Earlier this year, politicians and members of the Stauffenberg family came forward to criticize Cruise — who portrays the German hero — for his belief in Scientology, which the German government considers a cult.

There were also reports that the Defence Ministry was considering barring film crews from German military sites. Ultimately, only one site was declared off limits: the Bendler Block, a war memorial and former military headquarters where Stauffenberg organized the plot and also where he was executed when it failed.

In July, government spokesman Torsten Albig said permission for the site was not granted to preserve "the dignity of the place" and had nothing to do with Cruise's choice of faith.

With files from the Associated Press