The 34-year-old (pictured top) lost his left eye in the incident and was recovering at home when he suffered an apparent heart attack.

He died on the way to hospital.

Doctors had discharged Hernández, who was the sports secretary for the ruling Institutional Revolutionary Party (PRI) in Mexico state, after undergoing a series of three operations on the nine millimetre bullet wound on the front left area of his head, and he had been due to return to hospital for another operation.

As well as the athlete, two others victims were killed and a further two injured after gunmen burst into the Queen of Kings nightclub in Los Reyes La Paz on December 30.

Mexican police are looking for three men in connection with the shooting.

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