The crew was in the Chinese capital of Beijing on Monday filming a scene where two boats crash into one another.
The accident occurred when one of the vessels caught fire–killing 23-year-old stuntman Lu Yanqing and injuring three others.
Rescue teams believe the film team may have accidentally ignited gas cylinders aboard one of the boats, causing an explosion.
The epic film, about China’s ancient kingdom, is set to be Asia’s most expensive blockbuster to date–with a budget of $80 million.
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