LOS ANGELES — Bumble Bee Foods and two managers were charged by Los Angeles prosecutors Monday with violating safety regulations in the death of a worker who was cooked in an industrial oven with tons of tuna.

Jose Melena, 62, was performing maintenance in a 35-foot-long oven at the company’s Santa Fe Springs plant before dawn Oct. 11, 2012, when a co-worker, who mistakenly believed Melena was in the bathroom, filled the pressure cooker with 12,000 pounds of canned tuna and it was turned on.

His body was found two hours later after the pressure cooker, which reached a temperature of 270 degrees, was turned off and opened.

The company, its plant Operations Director Angel Rodriguez and former safety manager Saul Florez were each charged with three counts of violating Occupational Safety & Health Administration rules that caused a death.

Rodriguez, 63, of Riverside, and Florez, 42, of Whittier, could face up to three years in prison and fines up to $250,000 if convicted of all charges, prosecutors said.