Honolulu restaurant Peppa’s Korean BBQ was ordered to close on Thursday after being linked to an outbreak of E. coli O157 in seven people.

Officials said four of the seven patients were hospitalized and one of them is still in a hospital.

The health department said Peppa’s has agreed to cooperate fully and will remain closed and work with the DOH on an intensive mitigation plan to correct permit violations. The restaurant’s management will be required to attend the Sanitation Branch’s Food Safety Certification Workshop to receive training on proper food-handling practices.