Associated Press

LOS ANGELES - A state commission will investigate a fight that ended in the sixth round when journeyman Mexican flyweight Ruben Contreras suffered a seizure, according to published reports.

The California State Athletic Commission has requested a tape of Saturday's fight between Contreras and Brian Viloria from promoter Top Rank Boxing and will review the event round by round, the Los Angeles Times reported in its Thursday edition.

"We are not saying there was any wrongdoing whatsoever, but you can't let something like this go without an investigation. We will look at our procedures and see if there are any lessons to be learned," Dean Louhis, former executive director of the commission told the Times.

Louhis served as the commission's interim executive director until Wednesday, when he was replaced by Armando Garcia.

Contreras, of Ciudad Juarez, Mexico, quit a bout Saturday, suffered a seizure afterward and underwent brain surgery. The surgery successfully removed pressure from bleeding on Contreras' brain and was performed quickly enough to avoid permanent damage, doctors have said.

There were no knockdowns in the fight, but the 32-year-old Contreras was bleeding from the nose and mouth. He and Viloria fought on the undercard of the Julio Cesar Chavez-Ivan Robinson bout at Staples Center.

Contreras was still on a respirator Wednesday at California Hospital Medical Center but was gradually being weaned off medication used to induce the coma, hospital officials said.