The Chinese government has branded a YouTube video, purportedly showing Chinese police viciously beating Tibetan protesters, as a fake.
The film, apparently taken last March near Lhasa, was put on the video sharing site last Saturday and is believed to be what sparked China's renewed blocking of the site.
The second part of the film is of Tendar, a Tibetan employee of China Mobile, who intervened to stop a monk being beaten by police during the riots last March. He was beaten up by police and activists claim Chinese authorities withheld even basic medical care, leaving Tendar with gangrenous wounds.
Despite an operation to remove rotten flesh after his release from custody, shown in the video, Tendar died from his wounds in June 2008.
But a Chinese government spokesman said the video had been falsified: "The image of an injured person in the video is not that of Tendar and the wounds were fake."
The official said Tendar died at home while awaiting trial. Government mouthpiece China Daily reported that Tendar used a knife to slash a policeman during the riot and that the policeman, after several warnings, acted in self-defence.
The final section of the clip shows the heavy military presence in Tibet in the run up to the 50th anniversary of the Tibetan uprising.
The film is available here, but be warned that it includes extremely unpleasant footage of apparent beatings and medical operations.
You can read more here from Tibet's exiled administration. ®