LODI (CBS13) – Cal/OSHA says they’ve opened an investigation into the death of an employee at the Delta Packing Co. facility in Lodi this week.

The incident happened on Tuesday. According to Cal/OSHA, six Salinas Farm Labor Contractor employees were sent to the hospital from the facility that evening.

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The employees were working in an area where ammonia gas was leaking, authorities say.

One of the employees died at the hospital. Cal/OSHA says that employee had been reportedly feeling sick when emergency services were called.

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The other five employees were later released from the hospital uninjured.

Cal/OSHA is now investigating the incident.

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Delta Packing Co. packs and ships cherries from California as wine grapes and grape juice.