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After at least a dozen people reported getting sick after eating at a Chipotle outpost in Sterling, the company temporarily shut down the Virginia shop on Monday and Tuesday.

Chipotle alerted local health department officials following “a small number of reported illnesses” at the location on Tripleseven Road, according to an emailed statement from Chipotle’s director of food and safety, Jim Marsden.

Though Marsden predicted that the shop would reopen on Tuesday, it opened a day later.

The site “I Was Poisoned” has 15 instances of ailments from eating at this location in the past several days. People reported diarrhea, fevers, nausea, and vomiting, among other symptoms.

Marsden said that the symptoms are consistent with norovirus, which he said doesn’t come from Chipotle’s food supply.

The contamination is most common in kitchens when sick people prepares food with their bare hands or doesn’t properly clean work surfaces that they’ve touched, according to the Center for Disease Control and Prevention, which also said that fruit and vegetables can become affected in the field.

“It is safe to eat at Chipotle,” said Marsen, a former meat science professor who was hired months after an E.Coli outbreak in the summer of 2015. There were also reports of salmonella and norovirus outbreaks over the next several months. A year after the outbreak, the company was struggling to win back its customers.

“We take every report of illness seriously,” Marsen said. “In accordance with our established protocols, our team is working to ensure the safety of our customers and employees, including voluntarily closing the restaurant yesterday to conduct a complete sanitization.”

Meanwhile, the chain’s stock reportedly dropped six percent after the complaints surfaced.

This post has been updated.