Chipotle shuts down restaurant after reports of customers becoming ill

NEW YORK — Chipotle says it temporarily shut down a restaurant in a Washington, D.C., suburb following reports of customers becoming ill, marking what could be a setback in the chain’s efforts to recover from past food scares.

The company says it shut down a location in Sterling, Virginia, on Monday after becoming aware of a “small number” of reported illnesses. It says it is working with health authorities to understand the cause, but the reported symptoms are consistent with norovirus. Chipotle says it plans to reopen the restaurant later Tuesday after a “complete sanitization.”

The Denver-based company notes that norovirus does not come from its food supply and it is safe to eat at its restaurants.

Chipotle has been working to bounce back from food scares that included an E. coli outbreak in the fall of 2015 and included a norovirus case in Boston later that year. The efforts have included tweaks to cooking procedures and training for employees to prevent such cases.

Norovirus is the leading cause of illness and outbreaks from contaminated food in the United States, according to the Centers for Disease Control and Prevention. Infected employees are frequently the source of the outbreaks, the CDC says, often by touching foods such as raw fruits and vegetables with their bare hands before serving them. Symptoms include nausea, stomach pain and diarrhea.

Chipotle Mexican Grill’s shares fell more than 5 percent Tuesday, after Business Insider reported the closure in Virginia.