Police in the northern state of Sonora say the 35-year-old trainer was attacked over the weekend in the Sonora town of Etchojoa.
Amateur video of the late Saturday attack was circulated on media sharing sites Monday, showing the trainer circling the tiger and making the animal turn slowly on a low platform.
On one pass, the tiger suddenly stops his spinning routine and reaches out and grabs the trainer.
Other circus employees immediately came to his aid, trying to drive the tiger off by hitting him with a metal stand.
However, the tiger continued attacking, and the trainer died at a hospital of blood loss.
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