Two managers at a Bumble Bee plant in L.A. were charged Monday in the death of a worker who was literally cooked in an industrial oven along with 12.000 pounds of tuna.

Los Angeles prosecutors say the men and the company itself violated safety regulations, which resulted in the tragic death of Jose Melena in October of 2012.

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.

When a supervisor noticed Melena was missing, an announcement was made on the intercom and employees searched for him in the facility and parking lot, according to a report by the California Division of Occupational Safety and Health.

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.

The charges specify that the company and the two men willfully violated rules that require implementing a safety plan, rules for workers entering confined spaces, and a procedure to keep machinery or equipment turned off if someone's working on it.

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. Bumble Bee Foods faces a maximum fine of $1.5 million.

The state's occupational safety agency previously cited the San Diego-based company for failing to properly assess the danger to employees working in large ovens and fined it $74,000.

Bumble Bee, which has appealed the penalties, said the company improved its safety program after the tragedy.

"We remain devastated by the loss of our colleague Jose Melena in the tragic accident," the company said in a statement. "We disagree with and are disappointed by the charges filed by the Los Angeles district attorney's office."

Florez refused to comment, and messages seeking comment from Rodriguez were not immediately returned.

District Attorney Jackie Lacey said prosecutors and investigators from her office have been going to major industrial accidents to ensure illegal and deadly work practices are prosecuted.

Prosecutions of workplace violations are uncommon — even in fatalities.

The state cited nearly 15,000 workplace violations in 2013, according to the state agency. Of 189 fatality investigations opened that year, the state only referred 29 to prosecutors.

District attorneys only filed charges in 14 cases that year, though some of those charges could have been for cases referred in earlier years. They could have brought charges subsequently for cases filed in 2013.

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