Sushi King in Bentonville remained closed Monday, and health officials continued to receive reports from people who said they were sickened after eating at the restaurant. As of Monday, 123 people have reported becoming ill.

Food taken from the restaurant tested negative for salmonella. The outbreak was linked to Sushi King through food histories taken of the people who had become ill, said Ann Wright, a spokeswoman with the Arkansas Department of Health and Human Services.

Sushi King owner John Wei voluntarily closed the restaurant while the Benton County unit of the Health Department completes its investigation. Wei said he does not know when he will reopen the restaurant. All food in open containers must be thrown out. The restaurant must be sanitized. And, employees must take classes on safe food handling.

Wei likened the requirements to opening a restaurant from scratch.