Fresno authorities said that one person is dead and four others are wounded, including the suspected gunman, in a workplace shooting at a food service company.

A gunman on Tuesday killed two people and wounded two others at a chicken processing plant in Fresno, Calif., before turning the gun on himself, authorities said.

The suspect, a co-worker of the victims, was found outside the plant with what appeared to be a self-inflicted gunshot wound to the head, Fresno Police Chief Jerry Dyer told reporters. He died a few hours later.

Police initially reported one death, but a second victim later died, the local coroner stated.

The names of the victims were not immediately released.

The suspect was identified as Lawrence Jones, 42. He has an "extensive criminal history," Dyer added.

Jones reported for work before dawn and his coworkers noticed that he "did not appear to be himself," Dyer said. Jones was at the meat processing plant for more than three hours before opening fire with a handgun, Dyer said.

Dyer initially said the plant is called Apple Valley Farms, but city of Fresno spokesman Michael Lukens later said the business recently changed its name to Valley Protein. The facility processes poultry, he said.

KSEE 24 First aid responders treat a person at the scene of the shooting in Fresno, Calif., Tuesday morning.

Fresno, a city with a population of about 500,000, is located 160 miles southeast of San Francisco and is surrounded by farmland in the San Joaquin Valley.

The Associated Press and Reuters contributed to this report.

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