Spectator killed by bird during cockfight

A US man attending a cockfight has died after being stabbed in the leg by a bird that had a knife attached to its own limb.

The Kern County coroner in California said 35-year-old Jose Luis Ochoa was declared dead at a hospital about two hours after he suffered the injury on January 30.

A post mortem concluded Mr Ochoa died of an accidental "sharp force injury" to his right calf.

Sheriff's spokesman Ray Pruitt said it was unclear if a delay in seeking medical attention contributed to Mr Ochoa's death. Tulare officials are investigating, and no arrests were made at the cockfight.

Cockfighting is a sport, illegal in the United States, in which specially bred roosters are put into a ring and encouraged to fight until one is incapacitated or killed.