Five people were taken to the hospital on Saturday, July 29 when a hazardous materials team responded to reports of ill workers at the Diamond Jamboree shopping center in Irvine, fire officials said.

Firefighters shortly after 1:15 p.m. received a call about people feeling ill at the Yigah Restaurant at 2715 Alton Parkway, Orange County Fire Authority Capt. Larry Kurtz said.

Orange County Fire Authority’s hazmat team, Firefighters and the Irvine Police Department investigate a hazmat situation at Diamond Jamboree shopping center at 2750 Alton Parkway in Irvine on Saturday afternoon, July 29,2017. Several people were transported to local hospitals to be checked out. (Photo by Richard Koehler, Contributing Photographer)

Orange County Fire Authority’s hazmat team, Firefighters and the Irvine Police Department investigate a hazmat situation at Diamond Jamboree shopping center at 2750 Alton Parkway in Irvine on Saturday afternoon, July 29,2017. Several people were transported to local hospitals to be checked out. (Photo by Richard Koehler, Contributing Photographer)

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Orange County Fire Authority’s hazmat team, Firefighters and the Irvine Police Department investigate a hazmat situation at Diamond Jamboree shopping center at 2750 Alton Parkway in Irvine on Saturday afternoon, July 29,2017. Several people were transported to local hospitals to be checked out. (Photo by Richard Koehler, Contributing Photographer)

Orange County Fire Authority’s hazmat team, Firefighters and the Irvine Police Department investigate a hazmat situation at Diamond Jamboree shopping center at 2750 Alton Parkway in Irvine on Saturday afternoon, July 29,2017. Several people were transported to local hospitals to be checked out. (Photo by Richard Koehler, Contributing Photographer)

Orange County Fire Authority’s hazmat team, Firefighters and the Irvine Police Department investigate a hazmat situation at Diamond Jamboree shopping center at 2750 Alton Parkway in Irvine on Saturday afternoon, July 29,2017. Several people were transported to local hospitals to be checked out. (Photo by Richard Koehler, Contributing Photographer)



Orange County Fire Authority’s hazmat team, Firefighters and the Irvine Police Department investigate a hazmat situation at Diamond Jamboree shopping center at 2750 Alton Parkway in Irvine on Saturday afternoon, July 29,2017. Several people were transported to local hospitals to be checked out. (Photo by Richard Koehler, Contributing Photographer)

The five workers reported “general sickness” such as nausea and dizziness, Kurtz said.

After searching the restaurant and surrounding spots, the Hazmat team did not find any gas leaks or contaminants.

The investigation has been turned over to the Orange County Health Care Agency, which will look into whether the employees were suffering from food poisoning and if so, where they might have gotten it.